Thetford Porta Potti 335, 345, 365 & 565E: Parts & Sizes

Thetford makes several portable toilets with a freshwater flushing compartment above a removable waste tank. The 335, 345, 365 and 565E share the same basic two-piece idea, but differ in tank size, overall height and flush mechanism. Use the manufacturer's model and part number to select the correct complete toilet or identify a repair part.

Compare the exact portable toilets in photographs

Porta Potti 335, compact piston-flush toilet

View 92828 product

Porta Potti 345, piston-flush toilet

View 92814 product

Porta Potti 365, taller piston-flush toilet

View 92820 product

Porta Potti 565E, electric-flush toilet

View 92306 product

Which Porta Potti model fits your space?

The taller 365 and 565E offer a higher seat position than the compact 335 and 345. Check the full height, including clearance to lift the lid, before buying for a van, camper or boat. The Porta Potti 135 is a different bellows-pump model; it has its own manufacturer's parts list and should not be treated as the 335.

Identify the original model before ordering parts

Thetford's label identifies the model, part number and production code. The first six numerical digits of the code indicate the manufacture date in YYMMDD format. That is important where older Porta Potti versions have different pump or seat components.

Factory repair part numbers by model

Thetford's parts sheets identify some numbers as superseded, limited availability or unavailable. The drawings below are the reference for your exact model and production version; a service number alone does not establish that a replacement is currently for sale.

Original exploded parts drawings

335 numbered components (PDF), 345 numbered components (PDF), 365 numbered components (PDF), and 565E electric-flush components (PDF). You can use Thetford's identification-label guide (PDF) to locate the model label before choosing a part.

Emptying and maintenance

1. Keep the toilet level and secure during use and transport, following the appropriate model's instructions.
2. Disconnect the upper section from the lower tank only as shown by the manufacturer.
3. Empty the removable waste tank at an approved disposal point, using its rotating spout and vent controls as instructed.
4. Rinse and maintain the valve seals with products recommended by Thetford. Protect the tanks and pump against freezing during storage.

For another type of self-contained portable toilet, see our Dometic 972/976 guide. Its tanks and replacement components are not interchangeable with Porta Potti components.

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