Will The Replacement Water Valve TH78SA Fit A Thetford 42054 Toilet?
Updated 09/14/2026 | Published 09/04/2026
Question:
My Thetford rv toilet is a model 42054 but I dont see this number in the list of compatibile toilets. Will it work for mine or is there a different kit I need?
asked by: Janis W
Expert Reply:
Hi Janis!
The Replacement Water Valve for Thetford Aqua-Magic Style II RV Toilet - Restores Flush Power - Qty 1 # TH78SA will indeed fit your toilet. The Thetford 42054 you have is an Aqua-Magic Style II and this is specifically for that model line. And just to make 100% sure, I confirmed all this with Thetford as well. ^___^
What kind of camper do you have this in?
Product Page this Question was Asked From
Replacement Water Valve for Thetford Aqua-Magic Style II RV Toilet - Restores Flush Power - Qty 1
- Accessories and Parts
- RV Toilet
- Valves
- Water Valve
- Thetford
more information >
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Brian B.
9/14/2026
Tried to replace to valve and it ended up messing up the flange that hold the valve in. I ended up replacing the whole toilet with a Dometic Model 420 Platinum RV... Best move we made. This is more like a residential toilet.