The Thetford Porta Potti 345 has a manual piston-pump flush, a detachable waste tank and a separate fresh-water reservoir. When replacing a cap, pump, spout or tank seal, start with the model number and the original part number rather than choosing by appearance alone.
Identify the toilet and replacement lip seal
Porta Potti 345 exploded parts diagram
Thetford's original numbered illustration shows the removable seat, piston pump, filling cap, lip seal and pour-out hardware. Open the PDF to enlarge the drawing and compare each callout with your toilet.
Numbered replacement-parts reference
Use these Thetford part numbers to identify the original components. Some older numbers were replaced; check the current kit contents before ordering.
| Callout | Part number | Part or assembly |
|---|---|---|
| 1 | 0733179 | White seat-and-cover assembly; replaces earlier 07331 |
| 2 | 25818 | Piston-pump flush assembly for Porta Potti 345 |
| 3 | 35804 | No-spill fresh-water filling cap |
| 4 | 07101 | Rubber lip seal for the lower waste-tank opening. View replacement seal |
| 5 | 0749262 | Pour-out spout; replaces original 07492 |
| 6 | 0749362 | Pour-out spout cap; replaces original 07493 |
| Not shown | 29371 | Flush tube |
| Not shown | 07024 | Inlet tube |
Check the model before choosing a part
The 345 uses the piston pump numbered 25818. Although Thetford's combined PDF also shows a Campa Potti XG bellows assembly, it is a different flush system and should not be selected for the 345 by appearance. Confirm model 345 on the identification label and inspect the existing pump, tank opening or spout.
Thetford's list covers the post-2006 Porta Potti 345. Earlier models may use different parts, so compare the product identification label before ordering.