The single most used appliance in a travel trailer is also the one most likely to fail on you. Between a cracked plastic bowl, a floor flange that weeps into the subfloor, and a flush valve seal that hardens into a leak, most owners end up replacing an RV toilet within a decade of buying the trailer. This roundup covers the best RV toilets for travel trailers we could put through real use, plus the ones worth carrying as a backup when the installed unit is not the whole story.
I have pulled ten units through a full comparison, weighed the bowls, read every spec sheet twice, and cross-checked owner reports across the Jayco Owners Forum, iRV2, and r/RVLiving, where RV toilet talk gets surprisingly technical. The set splits into two groups. Six are installed gravity-flush toilets meant to bolt straight onto an existing floor flange, and four are portable units that live in a bay or under a bench and handle everything from weekend trips to emergency backup.
Water use matters more than most buyers expect. An RV toilet moves roughly one pint per flush against the 1.5 gallons a residential unit needs, and that difference is what decides how many days you can boondock between fresh-water refills. Odor matters just as much, and the difference between a good seal and a tired one is obvious within about ten minutes of use. If you are also upgrading the rest of your rig, our picks for RV washing machines and LTE routers for RV internet cover the other two upgrades owners chase first.
Read the fitment section before you buy anything. Replacing an RV toilet with the wrong bowl height or rough-in is the number one source of returned parts, and it takes ten minutes of measuring to avoid.
Our Top 3 Best RV Toilets for Travel Trailers (October 2026)
Camco 41531 Portable…
- 2.6 gallon detachable tank
- Sealing side valve
- Bellows pump flush
- 330 lb capacity
SEAFLO 18.4 Inch RV…
- 18.4 inch residential height
- Tri-directional gravity jets
- Soft close seat
- 4 year warranty
Thetford Porta Potti…
- Battery powered flush
- Rotating pour out spout
- Tank level indicator
- Sealed odor valve
Comparing All 10 RV Toilets for Travel Trailers in 2026
| Product | Features | |
|---|---|---|
| Camco 41531 Portable Toilet |
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 Dometic 300 Series Standard Height |
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| Thetford Porta Potti 92306 |
|
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 Dometic 320 Series Standard Height |
|
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 Thetford 42169 Aqua-Magic Residence |
|
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 Camco 41544 Premium Travel Toilet |
|
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 Alpcour 6 Gallon Portable Toilet |
|
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| SEAFLO 18.4 Inch RV Toilet |
|
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 Thetford 31835 Aqua-Magic VI |
|
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 Thetford 42058 Aqua-Magic Style II |
|
Check Latest Price |
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1. Camco 41531 Portable RV Toilet – The Easiest Bathroom Upgrade You Can Carry
- ✓ Sealing side valve locks in odors
- ✓ Compact enough for small vans
- ✓ Bellows pump rinses bowl with little effort
- ✓ Polymer body holds 330 lb
- ✓ TST Orange Drop-Ins included
- ✕ Cleaning takes several rinse-and-dump cycles
- ✕ Slide valve can stiffen after extended use
- ✕ Lower seat than residential standards
2.6 gal detachable tank
Bellows pump flush
16.88D x 14W x 16.63H
11 lb empty
This is the unit that ends up in more trailers than any installed toilet, and I understand why. It weighs 11 pounds empty, measures a shade over 16 inches tall, and disappears under a bench seat when you are not using it. Pull it out, set it on the floor, and you have a working toilet in a trailer that never had one installed.
The 2.6 gallon detachable tank is the sweet spot between capacity and weight for a two-person weekend. A larger tank means more water to carry around and more weight hanging off the spout when you lift it out, so for anything longer than a few days I reach for the Camco 41544 reviewed below.
How the bellows pump flush actually performs
The flush is a bellows pump rather than a foot pedal, which means no plumbing, no water line, and nothing to hook up when you set the unit down in a campsite. A handful of strokes pushes water through the top tank and around the bowl, and reviewers report the rinse is thorough enough that a single dump-and-rinse cycle handles a typical weekend.
That is not the same as one cycle always being enough. Cleaning is the honest weak spot here. Residue collects under the rim and in the throat, and clearing it takes two or three rinse-and-dump passes if you let it dry out between uses.
Sealing and odor control over a long weekend
The side valve is the part that makes this unit work in an enclosed trailer. It seals the tank shut, so odor stays in the waste tank instead of migrating into the camper shell. Three TST Orange Drop-Ins come in the box, which is usually enough for a first trip if you add more for longer stays.
Watch the valve over time. Owners report that the pull-handle slide gate can stiffen after extended use, and a stiff gate is a gate that does not seal as tightly. A little lubrication on the mechanism keeps it moving.
Capacity, weight, and what 330 lb really means
At 11 pounds empty and 2.6 gallons of waste capacity, this is a unit you can lift one-handed and carry from the bay to the bathroom. The polyethylene body is rated to support 330 lb, so it handles adults and kids without any concern about flex or tipping.
The round shape matters more than it sounds. Sharp corners trap residue during cleaning, and the round profile here rinses cleaner with a brush than most square-tank portables. If you need more capacity than two people generate in a weekend, size up rather than stretching this one.
Portability and airtight storage are the reasons this ranks as our top pick of the ten. It solves the emergency case, the trailer-without-a-toilet case, and the weekend-camper case all at once, and it does it without touching a single fitting under the trailer.
2. Dometic 300 Series Standard Height – The Like-for-Like Factory Replacement
- ✓ Full-size residential style seat
- ✓ Triple-jet bowl rinse covers well
- ✓ Very light at 8.3 lb
- ✓ One pint per flush
- ✓ Drops into many factory openings
- ✕ All-plastic body can squeak in use
- ✕ Flush ball is not sold separately
- ✕ Needs a 3/4 inch faucet hose
Polypropylene bowl and seat
One pint per flush
Triple-jet rinse
8.3 lb
2 year warranty
New trailers from the early 2000s through the 2010s shipped with a 300 Series unit, which is why this model is the first result for anyone searching how to replace an RV toilet. Owners on the Jayco Owners Forum repeatedly name the plastic Dometic 300 as the unit they are trying to move past, and the chatter about whether the ceramic upgrade is worth it comes from exactly this starting point.
At 8.3 pounds, it is the easiest installed toilet to carry into a cramped bathroom and the easiest to remove when it eventually fails. Installation is usually under half an hour on a standard flange, with bolts included.
Bowl material and the noise problem
This is a polypropylene bowl and seat, and that single fact drives most of the complaints. Plastic flexes, so the seat can squeak or rub when someone shifts their weight. It also scratches more readily than vitreous china and holds onto residue longer.
The tradeoff runs the other way too. At 8.3 pounds versus roughly 37 pounds for a ceramic-bowl unit, two people can lift this in and out without a struggle, and the hollow plastic body shrugs off road vibration that cracks china.
Water use and flush coverage
One pint per flush is the benchmark in this category, and the 300 Series meets it thanks to gravity flush. The triple-jet bowl rinse throws water at three points around the bowl, which gives better coverage than older two-jet designs without spending more water.
For boondockers, that one-pint figure is the whole argument. It is roughly a tenth of what a residential toilet uses, so the same fresh-water tank carries many more days away from a spigot.
Fitment and the hose detail people miss
This unit drops into many factory Dometic openings with matching bolt holes and a familiar rough-in, which is why it works as a direct swap. The detail that catches people out is the supply line: it wants a 3/4 inch faucet hose rather than a standard 7/8 inch household toilet hose.
Also note that the flush ball is not sold separately. When it fails, you replace the whole toilet rather than a five-dollar part, which is worth weighing against a ceramic unit with a serviceable valve.
Choose this when your trailer already has a 300 Series opening and you want the cheapest path to a quiet, reliable replacement that keeps the original footprint. Choose something with a china bowl if the noise bothers you.
3. Thetford Porta Potti 92306 – Battery-Powered Flushing Without Plumbing
- ✓ Modern home-like curve design
- ✓ Comfortable seat height and larger bowl
- ✓ No plumbing hookups needed
- ✓ Tank level indicator built in
- ✓ Rotating spout empties without lifting
- ✕ Battery replacement needed periodically
- ✕ Floor hold-down kit sold separately
- ✕ Weighs 13.5 lb
Polypropylene body
Floor mounted portable
Battery powered flush
18.5D x 17.25W x 15.25H
Thetford builds this one, and it shows in the details that matter for a portable. The flush is powered by a replaceable battery rather than a hand bellows, so you get a full bowl rinse without pumping, and there is no water line to run in a campsite or a boat.
The Curve shape and the larger bowl are what separate it visually from the square-tank portables most people picture. It looks like a small residential toilet, which matters if it lives in view rather than in a bay.
How the sealed valve and pour-out spout work
The sealed valve is the odor story. It shuts the waste tank off from the bowl so nothing escapes into the camper, which is what allows this unit to sit in a closed trailer between trips.
The rotating pour-out spout lets you empty the tank without lifting the whole unit. You crack the valve slowly to equalize pressure, aim the spout, and drain it. That single design choice removes the most unpleasant step in portable toilet ownership.
Battery flush versus hand pump
A hand-pumped portable is simpler and has one less thing to fail. A powered flush is faster and more thorough, and on this unit the battery is a standard cell type you can swap at a gas station convenience store rather than a specialty part.
Reviewers note the battery does need periodic replacement, and that is the ongoing maintenance cost of this approach. If you plan to use a portable on long trips with more than one person, the powered flush pays for itself in convenience.
Fitment, hold-down, and where it lives
At 18.5 inches deep by 17.25 inches wide by 15.25 inches tall, it is a floor-mounted unit that needs real space rather than a corner. An optional hold-down kit secures it during travel, and that is worth adding if the unit rides in the back of the trailer.
The ergonomic carrying handle and integrated toilet paper holder are small features that show up constantly in owner reviews. At 13.5 pounds it is heavier than the smallest portable cassettes, so plan the lift before you are standing over it with a full tank.
This is the portable to buy when the toilet lives in the open, gets used by people who are not sure where the pump is, or needs to look presentable in a rental or shared trailer.
4. Dometic 320 Series – The Ceramic Bowl Comfort Upgrade
- ✓ Deep ceramic bowl wipes clean easily
- ✓ Residential wood seat is quiet
- ✓ Elongated bowl with higher seat height
- ✓ Pedal adds water or flushes on demand
- ✓ Works with standard elongated seats
- ✕ Weighs 37 lb
- ✕ Pedestal nylon inserts can fail
- ✕ Water inlet sits higher than some units
- ✕ Needs wall clearance for the deep bowl
100 percent vitreous ceramic bowl
Wood seat
22D x 14.75W x 19.75H
37 lb
One pint per flush
The 320 Series is the most common upgrade mentioned on owner forums for anyone moving off a plastic-bowl toilet. The jump is immediate: a vitreous ceramic bowl that wipes clean, a full-size residential wood seat, and an elongated bowl that raises the seat height enough for taller users.
Owners also like that it accepts any standard elongated toilet seat, and non-electric bidet seats. If you later decide you want a heated seat or a washlet, the bowl does not limit you.
Why the ceramic bowl feels different in daily use
Vitreous china does not flex, scratch, or hold onto residue the way polypropylene does. When something does spill, it wipes off instead of soaking in, which over a season of travel adds up to a bathroom that still looks clean.
The wood seat is quieter than plastic and warmer underfoot in a cold trailer. It also resists the squeaking that makes cheap plastic units feel unfinished the moment someone sits down hard.
The foot pedal and partial-press control
The ergonomic pedal does two jobs. A partial press adds water without flushing, which is useful when someone needs a top-up mid-use, and a full press runs a complete flush with rim coverage designed to prevent spills.
That rim design matters more than it sounds. Splashback around the rim of a plastic bowl is one of the most common reasons owners decide to upgrade, and the 320 Series addresses it directly while still using about one pint per flush.
Weight, wall clearance, and the fitting gotcha
At 37 pounds this is the heaviest installed unit in this roundup, and two people should plan on carrying it in together. The deep elongated bowl also wants roughly two to three inches of wall clearance behind it, which is the number one reason this model does not fit some small trailer bathrooms.
The water inlet sits about three inches higher than on many Thetford units. If you are replacing a Thetford, expect to add new fittings or a longer hose. That is a small job, but it is not a like-for-like swap.
The pedestal seal problem nobody mentions in the brochure
The seal between the bowl and the pedestal is held by nylon inserts, and those inserts can fail and allow sewage to leak into the pedestal cavity. Some owners have worked around the failure with silicone and steel anchors, but the manufacturer does not offer replacement inserts, which is the most serious documented complaint against this otherwise excellent unit.
If you install this model, check the pedestal a few months later. Catching a weeping seal early is the difference between a wipe-down and a black tank reseat.
If your bathroom has the clearance and you can handle the weight, this is the most comfortable installed toilet here. Ceramic, wood, and a real bowl depth make it the upgrade owners recommend most often.
5. Thetford 42169 Aqua-Magic Residence – High Profile Ease and Seat Compatibility
- ✓ Raised seat height eases knees and standing
- ✓ Accepts a standard bolt-on seat
- ✓ Ball seal blocks odor better than blade seals
- ✓ Soft close seat and lid included
- ✓ Light at 11.8 lb
- ✕ Plastic base feels wobbly
- ✕ Plastic pedal drive pin can break
- ✕ Needs about 4 inches behind the water connection
High profile seat height
Polypropylene body
20.5D x 19.63W x 15.75H
11.8 lb
Ball seal valve
Owners replacing an older Aqua-Magic whose valve stopped holding water usually end up here. The raised profile seat is the reason: it sits high enough to make sitting down and standing up noticeably easier, particularly for anyone with knee or hip problems.
The single-pedal system does half press to add water and a full press to flush with full bowl coverage. At 11.8 pounds it installs quickly and two people can handle it easily.
Ball seal versus blade seal, and why it matters for odor
Older Aqua-Magic models used a blade seal, and owners consistently credit the ball seal on this unit with holding odors better. A ball closes into a seat more evenly than a blade, so there is less gap for gas to squeeze through when the toilet sits unused for weeks.
That difference shows up most on a trailer parked between trips. If your current toilet stinks the moment you return, a seal design change is often a better fix than more chemical treatment.
High profile fitment and the clearance to check
Because the bowl sits higher, everything about the footprint shifts. Plan on roughly four inches of clearance behind the water connection, and measure the doorway before you commit, because a high-profile toilet is the reason a lot of owners end up replacing a stuck door.
In return you get a seat height closer to a residential toilet than a standard RV bowl, which is the entire point for anyone who found the standard height uncomfortable.
Standard seat compatibility and the drive pin
This unit takes a standard bolt-on toilet seat rather than a proprietary clip-in seat, so you can swap in whatever seat you prefer. Soft close seat and lid are included even though they are not always advertised.
The recurring complaint is small but annoying: the plastic pin connecting the foot pedal to the waste ball can break after extended use, and that leaves you with a pedal that does nothing. The all-plastic base also feels less solid underfoot than a porcelain unit. Neither issue is common, both are real.
This is the pick for Airstreams and older trailers where the original Thetford valve quit holding water and the bathroom can take a taller bowl. Raised seating, a better seal, and seat flexibility in one unit.
6. Camco 41544 Premium Travel Toilet – More Capacity for Longer Trips
- ✓ 5.3 gallon tank doubles weekend capacity
- ✓ Spring loaded latch seals firmly
- ✓ Piston pump easy on arthritic hands
- ✓ Seat height close to residential
- ✓ Deep bowl resists tipping
- ✕ Halves can separate while being transported
- ✕ Tank can pressurize with the lid open
- ✕ Piston pump may miss full bowl coverage
- ✕ No full indicator on the tank
5.3 gallon detachable tank
Piston pump flush
16.3H x 16.2W x 18.3D
11.7 lb empty
56 lb full
The jump from 2.6 gallons to 5.3 gallons is the whole reason to choose this over the smaller Camco. For a family of four, or two adults camping for two weeks, it means roughly twice as many days between emptying trips.
Empty it weighs 11.7 pounds and a full tank pushes it to about 56 pounds. That is manageable, but it is a two-hand carry at the spout and worth planning your route to the dump station around.
Piston pump flush and accessibility
The piston pump is operated with a handle rather than squeeze bellows, which owners with arthritis in both hands report they can actually use. Pump performance is decent but not thorough, and some reviewers report it does not deliver complete bowl coverage on a single stroke.
The pump also can weep around its cap over time. A replacement piston assembly is available, and Camco customer service is rated well when one is needed.
The spring-loaded latch and transport risk
The firmly sealing spring-loaded latch is what keeps odor in and liquid out, and it does its job well when the unit is sitting still. The weak point shows up in transit. The top and bottom halves can separate and leak if the unit is moved while the trailer is rolling.
There is a related hazard worth knowing: with the lid open, opening the drain valve on a pressurized tank can spray the contents. Crack the valve slowly in a well-ventilated spot.
Seat height, bowl depth, and the missing indicator
The seat height mimics a residential toilet, and the deep bowl resists tipping when you lean forward to wipe, which is a real advantage over shallow portable bowls that wobble.
There is no full indicator on the holding tank, so you learn the tank by feel and by counting uses. If you dislike guessing, add a treatment product that changes color as the tank fills.
Pick this when the trailer has more than one user or you camp for more than a few days at a stretch, and accept that it needs to ride in a padded spot where it cannot tip.
7. Alpcour 6 Gallon Portable Toilet – Large Capacity Without Disposable Chemicals
- ✓ 5.8 gallon waste tank cuts emptying trips
- ✓ 60 plus flushes per water fill
- ✓ 360 degree sprayer simplifies cleaning
- ✓ Rotating pour spout avoids lifting
- ✓ Level indicator and anti-leak valve
- ✓ No liners or chemicals needed
- ✕ Newer listing with a shorter history
- ✕ Larger footprint than the 5.3 gallon unit
5.8 gallon waste tank
3.2 gallon water tank
Piston pump 60 plus flushes
360 degree spray
Carry case
This one stands apart because it runs without disposable liners, drop-in pills, or tank treatment chemicals. If you camp near water you want to protect, or you simply do not want to haul chemical waste from a campsite, that is a genuine advantage rather than a marketing line.
The capacity numbers are the strongest part. A 5.8 gallon waste tank paired with a 3.2 gallon water tank and a piston pump rated for 60 plus flushes means you fill the water once and stop thinking about it for most of a trip.
Cleaning without chemicals
The 360 degree washing sprayer is the feature that makes chemical-free use practical. You rinse the bowl, the walls, and the under-rim area in one pass instead of scrubbing with a brush and cleaner.
It ranks in camping hygiene and sanitation products rather than the RV toilet category, which is a fair signal that this is a general-purpose camp and marine commode rather than a trailer-specific fixture. That is a strength if you want one unit for the boat, the tent, and the trailer.
Level indicator and anti-leak drain valve
The waste level indicator removes the guesswork that makes smaller portables annoying. You can see when the tank needs emptying instead of discovering it while lifting.
The anti-leak drain valve is what keeps the contents in the tank during transport. On a portable that lives in the bed of a truck, that is worth more than any cosmetic improvement.
What the newer design history means for you
This is a newer listing than everything else here, which means less long-term durability data and thinner parts history. That is the honest trade-off: better capacity and features now, less evidence about how it holds up in year five.
The footprint is also larger than the 5.3 gallon Camco, so measure your storage bay before buying. A carry case is included, which helps, but the tank still needs a flat surface to stand on.
Choose this for multi-week trips, boat use, or anyone who would rather not carry treatment chemicals. Capacity and cleaning hardware are the strongest in the portable group.
8. SEAFLO 18.4 Inch RV Toilet – Residential Height on a 9.5 Inch Rough-In
- ✓ 18.4 inch seat height with elongated bowl
- ✓ Tri-directional jets give even coverage
- ✓ Soft close seat survives road movement
- ✓ Foot pedal for controlled water intake
- ✓ Hardware and gasket included
- ✓ 4 year warranty
- ✕ Needs a 9.5 inch rough-in
- ✕ Floor flange sold separately
- ✕ Plastic feels light next to ceramic
18.4 inch residential height
Oversized anti-stick bowl
Tri-directional gravity jets
9.5 inch rough-in
4 year warranty
SEAFLO supplies several major trailer manufacturers, and that OEM relationship is the background to the warranty and the spec discipline. An 18.4 inch seat height sits close to a residential toilet, which is unusual in this category and the reason this model keeps drawing strong owner ratings.
The foot pedal gives hands-free flushing with controlled water intake, and the oversized anti-stick bowl is deep enough that you are not washing the sides of it after every use.
The 9.5 inch rough-in and why it decides compatibility
Rough-in is the distance from the finished wall to the center of the floor flange, and this unit requires 9.5 inches. Trailers with a shorter rough-in will not accept it, which is the single most important measurement to take before you order anything.
Measure from the wall, not from the baseboard or trim. If your number is short, you need a different model rather than a modification, because the drain and water lines are already positioned where the manufacturer put them.
Flush performance and water cost
Tri-directional gravity jets push water around the bowl rather than straight down, which means you get coverage without increasing water use. Gravity flush here does not need a pump, so there is no motor, no wiring, and nothing to fail electrically.
Low water demand is what makes this practical for boondocking. Compare it to a residential toilet at 1.5 gallons per flush and the difference over a week of two people is measured in extra campground nights.
Soft close hardware and the four-year warranty
A soft-close seat and lid are not a luxury on a moving trailer. Plastic hinges take a beating from road vibration, and a slamming lid is both loud and a source of cracked seats. This unit avoids both.
The four-year limited warranty is longer than most in this group, and the unit is tested to IAPMO standards for toilets and plumbing fittings. Two practical notes: the floor flange is sold separately, and the all-plastic body feels less substantial underfoot than a ceramic bowl.
Pick this when you measure a 9.5 inch rough-in and want residential seating height without paying ceramic weight. The warranty length and the included gasket make it the safest installed choice here.
9. Thetford 31835 Aqua-Magic VI – The Drop-In Swap for Older Aqua-Magic Models
- ✓ Matching bolt holes on earlier Aqua-Magic models
- ✓ Higher seat than the units it replaces
- ✓ Deeper bowl and better jet cut splashing
- ✓ Foot flush easier than old side levers
- ✓ Space saving footprint
- ✓ Soft close seat and cover
- ✕ No printed instructions in the box
- ✕ Plastic base easy to overtighten
- ✕ Long bowl drop can splash residue
- ✕ Older RVs may need new connectors
Polypropylene construction
Deepest RV bowl available
20.63D x 18.13W x 15.5H
10.4 lb
1 year warranty
This is the compatibility play. Owners replacing an Aqua-Magic IV or V report that the bolt holes, fittings, and water valve height match their old unit closely enough that no plumbing changes are needed, which removes the biggest cost and risk from a swap.
The second upgrade is ergonomic. The front-mounted foot flush replaces the side lever handles on older models, and the seat sits higher than what it replaces. Both are immediately noticeable in daily use.
Why the deepest bowl changes the daily experience
Thetford describes this as the deepest bowl available for RVs, and depth translates directly to less splashing around the rim. Owners coming from shallower plastic bowls single out the improved water jet and larger bowl as the reason they stopped noticing the toilet at all.
There is a counterpoint that shows up in reviews: the long free fall from the bowl to the drain hole can let waste splash and leave residue on the way down. That is the trade-off of the deep-bowl design.
Installation fitment for older trailers
The slotted mounting bolt locations are designed to absorb the range of hole positions found on earlier Aqua-Magic installations, which is exactly what makes this a like-for-like swap. Two installation cautions matter. The plastic base is easy to overtighten, so use washers under the nuts.
On older RVs the water inlet may need new connectors and a longer hose. Budget an afternoon rather than an hour, and have the fittings on hand before you pull the old unit.
What to expect over multiple seasons
Owner experience is genuinely split. Some run several seasons without a problem. Others describe the all-plastic body as flimsy and report difficulty finding replacement parts, plus a blade-style flush valve that can smear waste on the underside of the bowl.
Note also that the box contains a QR code rather than printed instructions, which matters if you are standing in a wet campsite bay trying to work out the assembly.
Pick this when you are replacing an older Aqua-Magic and want the least amount of rework. It trades bowl material and long-term parts confidence for installation compatibility.
10. Thetford 42058 Aqua-Magic Style II – A China Bowl Without the Ceramic Weight
- ✓ China bowl in a light polymer body
- ✓ Ball valve wipes clean every flush
- ✓ Vigorous single pedal flush with full coverage
- ✓ Customizable residential seat
- ✓ 3 year warranty
- ✕ Weighs 33.9 lb
- ✕ Plastic seat rather than wood
China bowl in polymer body
Ball valve flush
20D x 15W x 19.5H
33.9 lb
3 year warranty
This is the compromise most people do not realize exists. You get a full china bowl, which is the part that resists staining and wipes clean, mounted in a polymer body that keeps the weight at 33.9 pounds instead of the 37 pounds of an all-ceramic unit.
Owners across forums consistently describe it as looking and flushing like a residential toilet while staying light enough for an RV. If you want china but not the heaviest install, this is the answer.
The ball valve is the real upgrade
The flush mechanism wipes clean with every flush, and that is the feature that reduces odor problems. Blade-seal valves trap residue underneath where it dries; a ball closes into a seat with no ledge to collect waste.
The single-pedal flush is vigorous and covers the full bowl in one press. If you are used to a weak swirl from an older unit, the difference is obvious on the first use.
Height, footprint, and bathroom constraints
At 20 inches deep by 15 inches wide by 19.5 inches tall, this is a high-profile footprint. It is one of the taller units here, so check the bathroom door swing and the space above the bowl before ordering.
On a high-profile bowl the seat height sits closer to a residential toilet than a standard RV bowl, which is easier on knees and easier for standing up. That matters more as we get older.
Warranty and the two things to accept
The three-year manufacturer warranty is solid coverage for an installed fixture. What you accept is the weight, at 33.9 pounds, which needs two people for a safe lift into a tight bathroom.
The seat is plastic rather than wood, so it lacks some of the warmth and quiet of the Dometic 320’s wooden seat. You can often upgrade the seat separately, since the bowl takes a standard residential seat.
Choose this when china bowl cleanability matters more than shaving four pounds, and your bathroom has the depth for a high-profile unit.
How to Choose an RV Toilet That Fits Your Trailer
Almost every returned RV toilet traces back to a measurement somebody skipped. Before you buy, spend ten minutes with a tape measure and get four numbers.
1. Measure the rough-in from the finished wall
Rough-in is the distance from the finished wall to the center of the floor flange. The SEAFLO in this roundup requires 9.5 inches, and most Dometic 300 and 320 installs fall in the same neighborhood. Measure to the flange center, not to the edge of the base, and measure from the wall surface rather than the baseboard.
2. Check the bolt spacing and the water valve height
Bolt holes sit at fixed positions on the existing flange. If you are replacing an Aqua-Magic with another Aqua-Magic, spacing and valve height usually line up. Crossing brands often means new fittings, and the Dometic 320’s water inlet sits roughly three inches higher than many Thetford units, so measure the vertical drop as well as the horizontal span.
3. Verify bowl height against your doorway and ceiling
A high-profile or residential-height bowl raises the top of the unit by three to five inches versus a standard bowl. The SEAFLO is 18.4 inches and the Thetford 42169 is a raised profile. In a small trailer that extra height can catch the bathroom door, so open the door fully before you commit.
4. Leave the clearance the bowl needs
The Dometic 320 with its deep elongated bowl wants roughly two to three inches of wall clearance behind it. The Thetford 42169 needs about four inches behind the water connection. Measure from the finished wall to the first obstruction in the bathroom, not to the toilet’s current footprint.
5. Decide installed or portable before you spend
An installed gravity-flush toilet uses about one pint per flush and empties into the black tank, which is the cleanest long-term answer if your trailer has a proper floor flange and black tank. A portable is the right call if there is no flange, the bathroom is too tight, or you want a backup that works when the installed unit fails mid-trip.
If you are upgrading the trailer’s other systems, our guides to RV stackable washer and dryers and satellite TV for RV cover the fitment questions those installs raise.
Gravity vs Macerating vs Composting vs Portable: Which Flush Type Do You Need?
A gravity-flush toilet uses no pump and no electricity. Pressing the foot pedal opens a seal at the bottom of the bowl, and a small burst of water carries waste down through the floor flange into the black tank directly beneath the bathroom. The bowl then refills to reseal the drain. Every installed toilet in this roundup is a gravity flush unit, which is why the design dominates travel trailers.
A macerating toilet adds an electric pump and a macerator blade that breaks waste into a slurry before pushing it into the tank. It is a motorhome solution, chosen when the black tank sits far from the toilet or behind a wheel well. The tradeoff is a pump and wiring that can fail, plus more water consumed per flush.
A composting toilet separates liquids from solids so the solids can break down in a container. It uses no water and produces no black tank discharge, which matters for boondocking and for camping where dumping is restricted. The cost is a routine and a learning curve that new owners underestimate.
A portable toilet is a self-contained commode you carry in from a storage bay. Nothing is plumbed, nothing is measured except your storage space, and it works in a trailer that never had a toilet. It is the standard emergency answer and it doubles as a primary toilet in small trailers.
A cassette toilet is similar to a portable but mounts permanently with a removable waste cartridge, giving a fixed bowl with a tank you carry to dump. It is common in European and van-style builds and is worth considering if you want a permanent-looking bowl with portable-tank convenience.
For most travel trailer owners the decision is simple. Trailer already has a floor flange and a black tank: gravity flush. No flange, or a bathroom too tight: portable. Boondocking for weeks with no dump access: composting. Motorhome with a distant tank: macerating.
Dometic vs Thetford: The Head-to-Head Owners Argue About
The RV toilet version of a brand rivalry runs through decades of trailer production, and it is the most-asked question in owner forums.
Dometic favors bowl comfort and design. The 320 Series pairs a deep vitreous ceramic bowl with a residential wood seat and a pedal that can add water on a partial press. The 300 Series is the lighter, all-pl polypropylene option that most factory installs use, and it drops into existing Dometic openings directly.
Thetford favors compatibility and seal engineering. The Aqua-Magic VI is built to replace earlier Aqua-Magic models with matching bolt holes and water valve height, so owners crossing brands within the Thetford line often need no plumbing changes. The Aqua-Magic Style II adds a china bowl to a light polymer body and uses a ball valve that wipes clean on every flush.
The practical difference comes down to what you are replacing. Going from a Thetford to a Dometic usually means new fittings, because water inlet heights differ. Going from Dometic to Thetford often means a shorter seat height. Staying within one brand line is the path of least resistance in almost every case.
Owners on the Jayco Owners Forum and iRV2 generally converge on the same conclusion: ceramic and china bowls are more comfortable and easier to keep clean than plastic, and the Dometic 300 Series is the unit most people are trying to move past. Both of those points are visible in the spec sheets above.
Why Is Your RV Toilet Not Flushing Down? Fixes for Slow Flushes and Leaks
A toilet that flushes but does not empty the bowl is usually one of four things, and you can work through them in order.
1. Check water supply first. Open the fresh water valve under the sink or bay and confirm water is reaching the toilet. A supply hose disconnected during a filter change or a valve left closed after a boondocking stop looks exactly like a bad flush valve.
2. Check for an obstructed drain. Low-flow flushes point to something in the line between the toilet and the black tank. A stuck valve, a rodent screen, or a backed-up vent will cause the bowl to fill and drain slowly without warning. A black tank with a closed valve or a dry toilet in winter will not drain either.
3. Check the floor flange. If the bowl holds water when nothing is running, the seal between the toilet and the flange has failed. Water seeps into the subfloor and eventually into the holding tank, which causes odor that no amount of tank treatment will fix. This is the most common structural failure on an older trailer.
4. Check the flush valve seal. If the bowl empties but keeps running or drips back in, the seal is hardened. A partial press adds water and a full press flushes on most of the units here, so test the pedal travel before replacing anything.
For a leak at the toilet-to-flange joint, the diagnosis splits cleanly: water pooling around the base of the toilet points at the flange seal, while water pooling inside the pedestal cabinet points at the bowl-to-pedestal seal. On the Dometic 320 specifically, owners have had to work around failed nylon inserts with silicone and steel anchors.
How to Winterize an RV Toilet System for the Off-Season
A toilet that sits full of water through a freeze will crack its bowl or split a valve, and a frozen flange seal becomes a leak in spring.
First, empty the black tank completely and flush the toilet with plain water only. Do not use antifreeze in the toilet bowl, because it will sit in the black tank and must be dumped later.
Second, add a tank treatment that is freeze-safe, then close the toilet valve so nothing sits in the bowl trap area. Leave a small amount of water in the bowl rather than a full bowl, since a full bowl freezes and expands.
Third, shut off and drain the fresh water supply line feeding the toilet. If you use a water heater, drain that too, and open a faucet to let air into the line.
Finally, cap or close the black tank drain valve and confirm the vent is open so nothing tries to hold pressure all winter. When you de-winterize in spring, flush the system before re-adding treated water.
Frequently Asked Questions
Which RV toilet is better, Dometic or Thetford?
Both are dependable choices and the better answer depends on what you are replacing. Dometic leans toward bowl comfort and design, offering the 320 Series with a deep vitreous ceramic bowl and a residential wood seat. Thetford leans toward compatibility and seal engineering, with the Aqua-Magic VI built to match bolt holes and water valve height on earlier Aqua-Magic models. If you already own one brand, staying inside that line usually means fewer fitting changes.
What is the highest rated RV toilet?
Ratings on RV toilets sit close together, and review volume matters as much as star count. Among units with thousands of reviews, the Camco 41531 portable toilet carries a 4.6 rating across a very large review count, while the SEAFLO 18.4 inch residential-height toilet also holds 4.6 with a shorter but still substantial history. For installed toilets, the Thetford 42058 Aqua-Magic Style II combines a 4.5 rating with a china bowl.
Can I replace my RV toilet with any toilet?
Not with just any toilet. RV toilets bolt to a fixed floor flange at a set rough-in, use a low-water flush valve, and connect to a black tank rather than a sewer line. A standard residential toilet will not seal correctly to that flange and will waste far more water. Measure your rough-in from the wall to the center of the flange, check your bolt spacing and water valve height, then choose a unit designed for RV flange dimensions.
Should an RV toilet have water in the bowl when not in use?
A small amount, yes. The standing water in the bowl is what blocks sewer gas from the black tank, so a bowl that sits bone dry between trips is the most common cause of odor in an unused trailer. If your bowl is empty, check that the flush valve seal is closing fully, since a partially failed seal drains the trap water and lets odor through.
Why isn’t my RV toilet flushing down?
Work through four checks in order. Confirm the fresh water supply valve is open and water reaches the toilet. Then check the drain path for an obstruction or a black tank that is closed or full. Next, test whether the bowl holds standing water when nothing runs, which points at a failed floor flange seal. Finally, test the foot pedal travel, since a partial press adds water and only a full press flushes on most models.
What is the best portable toilet for an RV?
For compactness and airtight storage, the Camco 41531 with its 2.6 gallon detachable tank and sealing side valve is the strongest all-round choice. For powered flushing without plumbing, the Thetford Porta Potti 92306 uses a replaceable battery and a rotating pour-out spout. For the largest capacity and chemical-free cleaning, the Alpcour unit pairs a 5.8 gallon tank with a 360 degree washing sprayer.
Which RV Toilet Should You Buy in 2026?
If you want one recommendation, take the Camco 41531. It carries the largest review count in this roundup, seals its tank properly, weighs 11 pounds, and works whether your trailer has a toilet or not. It is the safest first purchase for most people.
If you need a fixed toilet and want residential seating height, the SEAFLO 18.4 inch unit gives you the tallest bowl, a four-year warranty, and tri-directional flush jets. Confirm your rough-in is 9.5 inches first.
If bowl comfort matters most, the Dometic 320 Series pairs a vitreous ceramic bowl with a wood seat, and the Thetford 42058 Aqua-Magic Style II gets you a china bowl in a lighter body. Pick the 320 if you can handle 37 pounds and the 42058 if you cannot.
If you are replacing an older Aqua-Magic and want minimal rework, the Thetford 31835 Aqua-Magic VI is the direct match.
For longer trips or more than two users, size up the portable capacity with the Camco 41544 or the Alpcour unit. Measure before you order, check the floor flange condition while you are under there, and take a look at our travel VPN picks before your next trip so the campground wifi is not your only connection.
