Best Thetford Portable Toilets of 2026: Which Model Should You Buy?

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1. Best Overall: Porta Potti 365

Thetford Porta Potti 365 (92820)

• Flush: piston pump
• Waste tank: 5.5 gal, removable, per Thetford (the listing title reads 4/5.5G)
• Size: 16.81 x 15.08 x 16.3 in
• Weight: about 4 kg (net), per the listing

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Why it made the list: The 365 is the Thetford model most buyers pick, with a strong buyer rating from thousands of ratings. It uses a piston pump flush rather than the 135's bellows pump, and the 5.5 gallon waste tank means fewer trips to empty than the smaller 135, 335 and 345. Thetford describes it as suited to camping, outdoor events, boating and toddler training.

Highlights:

• Biggest waste tank of the manual-flush models.
• Removable seat and cover for easier cleaning, per Thetford.
• No batteries needed to flush.

Trade-off:

• It is larger than the 135, so check your storage space first.

Best for: Families and van campers who want capacity without electronics.

2. Best Budget (Under $150): Porta Potti 135

Thetford Porta Potti 135 (92860)

• Flush: bellows pump, per Thetford
• Waste tank: 2.6 gal, removable
• Build: removable seat and cover
• Warranty: 3 years, per the listing's warranty field

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Why it made the list: It is the lowest-priced current Thetford toilet we found with a solid rating record, at a strong buyer rating, with over a thousand ratings. No Thetford toilet sells anywhere near $30, so we set this award at under $150. The small 2.6 gallon tank keeps it light and compact for cars and tents.

Highlights:

• Smallest footprint in the lineup.
• Same basic design as larger Porta Potti models.
• Good for weekend trips and backup use.

Trade-off:

• The bellows flush and smaller tank are less suited to groups or long stays.

Best for: Couples and solo campers with limited space.

3. Best Premium / Upgrade Pick: Porta Potti 565E Curve

Thetford Porta Potti 565E Curve (92306)

• Flush: battery-powered electric flush
• Comfort: larger bowl and comfortable seat height
• Features: tank level indicator, integrated toilet paper holder, carrying handle
• Emptying: sealed valve and rotating pour-out spout

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Why it made the list: The listing calls the 565E a top-of-the-line portable toilet. The electric flush, taller seat and bigger bowl make it the most home-like Porta Potti, and the level indicator tells you when to empty. It is highly rated by buyers, with thousands of ratings.

Highlights:

• Battery-powered electric flush.
• Level indicator avoids surprises.
• Optional hold-down kit secures it in a moving RV.

Trade-off:

• It costs the most and needs batteries for the flush.

Best for: RV owners and full-timers who want the most comfortable portable toilet.

We did not test these toilets. We compared current Porta Potti models on size and weight, durability and weather resistance, comfort and ease of setup, features for camps and vehicles, and warranty and value. Our data came from Thetford's US portable toilet page, maker specs on each Amazon listing, and star ratings with rating volume. We only included models that Thetford's US site still lists.

Type

• Flushing: Every Porta Potti is a flushing toilet with a fresh water tank and a removable waste tank.
• Bucket: Simple bag-lined buckets; Thetford does not make one, but they cost far less.
• Composting: Separating toilets with no chemicals; not part of the Porta Potti line.
• Folding: Flat-pack frames with bags, best for emergency kits.
• Cassette: Built-in RV toilets with a tank you remove from outside; not part of the Porta Potti line.

Features worth paying for

• Privacy tent: Pair any Porta Potti with a pop-up shelter at open campsites.
• Waste bags: Not needed with Porta Potti tanks, but useful for folding backups.
• Tank level indicator: Found on the 565E; handy on long trips.

Weight vs comfort: car camping or backpacking

All Porta Potti models are for car camping, vans, boats and RVs, not backpacking. The 135 is the easiest to carry; the 365 and 565E hold more and feel more comfortable. For other brands, see our best portable toilet for camping guide.

Weather & season ratings

Portable toilets have no season ratings. Heat speeds up odor, so empty the tank more often in summer. Water in the tanks can freeze in winter, so drain them before cold storage and follow Thetford's care directions.

Setup, packing & storage

Fill the fresh water tank, add a holding tank treatment if you use one, and set the toilet on a level surface. In a vehicle, Thetford sells hold-down kits and carrying bags. Store the toilet clean and dry.

Materials, repairs & warranty

Porta Potti bodies are molded plastic with valves and seals that wear over time. Thetford sells accessories like bags, floor plates and hold-down kits on its US site. The 135 listing shows a 3-year warranty, and other listings show a limited warranty.

How much should you spend?

• Under $30: No Thetford toilet; only accessories such as carrying bags.
• Under $100: Still no current Thetford toilet when we checked; value brands fill this range.
• Under $150: Compact models like the Porta Potti 135, 335 and 345.
• Under $200: The 365 and the premium 565E Curve.
• Under $1,000: Composting toilets from other brands.

Thetford's US site lists five Porta Potti models. Here are the thetford portable toilet models compared by flush and waste tank, using Thetford's own descriptions:

The 345 has a solid record on Amazon (a strong buyer rating, with hundreds of ratings) and is a fair middle choice. The 335 has a small pool of about 74 ratings. Older models such as the 550P no longer appear on Thetford's US portable toilet page, so we left them out.

What is the best thetford portable toilet?

The Porta Potti 365 is the best thetford portable toilet for most people. It has a piston pump flush, a 5.5 gallon waste tank and a strong buyer rating, with thousands of ratings. The Porta Potti 135 is the compact budget pick, and the 565E Curve is the premium model with an electric flush.

Is thetford a good portable toilet brand?

Yes. Thetford makes a full current lineup, sells replacement accessories, and its Porta Potti models hold strong buyer ratings on large rating pools. Thetford portable toilet reviews on Amazon are strongest for the 365, 565E and 135, which is why they earned our awards.

Which thetford portable toilet should I buy?

Buy the 365 for the best balance of capacity and simplicity. Choose the 135 if space is tight or you camp only a few nights a year. Pick the 565E if you want an electric flush and the most home-like seat. That answers which thetford portable toilet is best for most setups.

How long does a portable toilet last?

No official lifespan figure is published. A Porta Potti can last many years if you empty and rinse it after each trip, keep the valve seal clean and avoid freezing water in the tanks. Seals and valves are the parts that wear, so inspect them each season.

Is a portable toilet worth it?

For camping with kids, vans, boats and RVs, yes. A flushing portable toilet gives you a clean option at night and at sites without restrooms. If you have been reading a thetford portable toilet review and still wonder, think about how often you camp without facilities.

How do you clean a portable toilet?

Empty the waste tank at a dump station or toilet using the pour-out spout, then rinse it with clean water. Wipe the bowl and seat with a cleaner the maker approves, and let the tanks dry. Avoid harsh chemicals that could damage the seals.

What is the most reliable portable toilet brand?

Reliability depends on the model, not only the brand. Thetford has some of the biggest rating pools in this category, with its 365 near thousands of ratings. For any best thetford portable toilet 2026 purchase, compare tank size, flush type and storage space, and see our best portable toilet for rv and best portable toilet for boat guides.

The Porta Potti 365 is our pick for the best thetford portable toilet, with a strong piston flush and a big 5.5 gallon waste tank. The Porta Potti 135 is the compact budget choice, and the 565E Curve is the premium upgrade with an electric flush. Check price on Amazon for today's deals, and compare other brands in our best portable toilet guide.