There are a couple of ways to do this. One, on Thetford toilets, at least the ones I've seen, there is a kit sold at RV parts locations that attaches to the flush valve and you can hang on the wall. You use it buy activating the flush valve and the spray head at the same time. Some have taken that kit or gotten a sprayer hose and fittings and tapped into the toilet supply line. The advantage to this is you can use the sprayer without activating the flush valve. The disadvantage is if you have small ones they can have all the fun in the world without having to activate the flush valve at the same time..........
One thing, if you don't have a separate shutoff valve on the toilet supply line, it would be a good time to put one on when you install a sprayer.
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2007 Keystone Cougar 243RKS
2019 Ford F150 S/Crew ECOBoost
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