Thetford parts reference
Thetford 622394
Drain Hose Assy
622394 is the Thetford part number for the drain hose assy. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Thetford says to use 639104 instead
Thetford marks this number with “USE 639104” on its own parts list, which is the manufacturer telling you 639104 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: 639104
Which parts lists carry this number
It appears on the parts list for the N51 SeriesN41 Series.
Where this comes from
- Document
- PL_N41N51_623424_20201111-1.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
096a024dd2a77726dedae6b75a6f2788e53d9d8c
What we have not checked
We can show you that 622394 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.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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