Replacement Flange Needed To Switch Out A VacuFlush Toilet For A Dometic 320
Updated 02/03/2026 | Published 07/29/2024
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Question:
I bought a domestic 320 to replace my old vacuflush toilet I think I need a different flange for the new toilet can you tell me what I need to get?
asked by: Ted f
Expert Reply:
Hey Ted,
Is your VacuFlush a four-bolt flange with the bolts more in an x-pattern rather than lined up with a standard toilet flange, like you'd see at your house? If so you can use Dometic's RV Toilet Floor Flange Adapter Kit # DOM73FR to transition back to a two bolt flange and mount the 320 # DOM87FR.
If your flange is just broken and in need of replacement then you would want to check how it mounts to the drain pipe. If it screws on then we have ones with internal threads # T05-0784 and external threads # T05-0782. If it's glued into place then you'll need to cut it off and either use a hub-type flange # 344633633 to slip over the drain pipe.
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on RV Toilets
Jerred H.
2/3/2026
Hey Ted, how did things go with the Dometic 320 and the flange options you were looking at? Did the adapter kit or one of the threaded flanges end up being the right match? Your update could make it easier for the next person swapping out a VacuFlush toilet.