Review on Valterra A70 No-Fuss Flush with Check Valve: Effortless RV Tank Cleaning Solution in Vibrant Yellow by Mark Powell

Bought because our caravan was not cleaned of black or gray water. Based on the reviews this is the best of all and I have to agree. This was a very easy install, although depending on how your tank is seated it can be a bit tricky. I added a quick connect and 10ft hose under the RV and routed it to the side wall where I installed a hose fitting very similar to your fresh water connection and added a quick connect on the back. To use, I simply connect a hose to the outside of the RV, turn on the water, after a few minutes unhook the hose and you're done. For wintering, I simply remove the bottom hose, blow out all the water, roll it up, done. Great cleaning accessory.