Thetford · Catalog Reference
Thetford 627978
Door Assy-Black Gasket/With Flapper
627978 is the Thetford part number for the door assy-black gasket/with flapper. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Current eBay listings for Thetford 627978
Search eBay for Thetford 627978eBay carries exact OEM numbers, discontinued parts and old stock that general retailers drop, which is usually where a part this specific turns up.
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Also search Amazon for this part number
Catalog Reference: this number appears in manufacturer documentation, but model compatibility has not yet been confirmed.
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What this number replaces
If you were looking for 627598, this is the number that part points to. Thetford marks it with “USE 627978”, so 627978 is the one to order.
Which parts lists carry this number
It appears on the parts list for the 1200 Series.
Check the version before you order
This part comes in more than one version, and they differ by colour. Ordering the wrong one gets you a part that is real, correct for the model, and still not the one you need. The other versions on the same documentation are listed below — check yours before ordering.
Where this comes from
- Document
- Thetford parts list for 1200 SeriesPL_629700_1200_022025.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
55e15e16179f868835f72a4f2fce72d7a0ad8c6c
What we have not checked
We can show you that 627978 is a real Thetford number, what Thetford calls it, and which parts lists carry it. Model compatibility has not yet been confirmed. That depends on your model year, build date and what is actually installed, and we do not publish a compatibility claim until we can show it in the manufacturer’s own document.
Current marketplace inventory
Listings from eBay
These results match your search terms. Camper Replacement Parts has not yet confirmed compatibility for this part.
Checking current eBay inventory…
Camper Replacement Parts is not the seller. Price, shipping, stock and item condition are set by the eBay seller and can change at any time. We may earn a commission if you buy through these links.