Thetford parts reference
Thetford 35804
No-Spill Water Fill Cap
35804 is the Thetford part number for the no-spill water fill cap. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Which parts lists carry this number
It appears on the parts lists for 11 different models: Porta Potti135.135Marine.155.155SL, Porta Potti235.245.255.265, Porta Potti260.335, Porta Potti260335, Porta Potti345.Campa Potti XG, Porta Potti345Campa Potti XG, Porta Potti365.365MSD, Porta Potti465.465MSD, Porta Potti465465MSD, Porta Potti555.565.735 and Porta Potti735MSD735Marine775MSD. A number shared across several models usually means the component was carried over between them, which is useful when the exact list for your model is not the one you can find.
Availability
Thetford marks this number with an asterisk, and the legend on that document reads “LIMITED AVAILABILITY”. It is still a live number, but supply is constrained, so it is worth checking secondary sources rather than assuming it is freely stocked.
Where this comes from
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
0f92a59aad6a3c2f82b241d7ca3b62c1fc7f0ea2
What we have not checked
We can show you that 35804 is a real Thetford number, what Thetford calls it, and which parts lists carry it. We have not verified that it fits your camper. That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.
Current marketplace inventory
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