Thetford parts reference
Thetford 639104
Kit Service Drain Hose Replacement
639104 is the Thetford part number for the kit service drain hose replacement. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
What this number replaces
If you were looking for 622394, this is the number that part points to. Thetford marks it with “USE 639104”, so 639104 is the one to order.
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 639104 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.
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