Thetford parts reference
Thetford 622391
Drain Hose Assy-N8 Series
622391 is the Thetford part number for the drain hose assy-n8 series. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Thetford says to use 639101 instead
Thetford marks this number with “USE 639101” on its own parts list, which is the manufacturer telling you 639101 is what to order now. That instruction comes from the document, not from us, and not from what sellers happen to call the part.
Current number: 639101
Which parts lists carry this number
It appears on the parts lists for 5 different models: 2117 Series, N1095 Series, N61/N81 Series, N62/N82 Series and N64/N84 Series. 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.
Where this comes from
- Document
- PL_2117_630367_20231019.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
646263f6071845ff185770ccb487a45830e0bbcc
What we have not checked
We can show you that 622391 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.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
Listings from eBay
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