Do you have a tank rinse low point drain? If so, it should work just the same. Turn the water source off and then use the low point drain to release the pressure.
Not sure which hose you are addressing. If you are using a short hose hookup to the new shower valve setup or to a setup like mine, as soon as the shower valve or in-line valve in mine is closed the rinse water pressure is immediately released into the tank and when you release the quick disconnect at the tank rinse connect the short hose will not spray and a small dribble will release out of the tank rinse connection.
TJ, I may be wrong (and as you said that is conferred to me often by the DW) but I don’t think it matters. The tank is vented and the rinse line ends in the vented tank area. So as soon as you turn the source valve off the line pressure drops to zero almost immediately. By opening the drain valve you will be draining a line with no pressure. The reason you get a back spray out of these back flow preventers is they are releasing the pressure that’s left in the line after the source is turned off. If no pressure no back spray.I just noticed something that has been hiding in plain sight; the tank rinse low point drain. (See photo of my install on Page 1)
Of course, I use it to winterize my coach, but it just occurred to me that I could use it to release pressure before disconnecting the hose. Duhhhhhh!
Turn the water supply off and a simple twist of the valve handle should release all pressure in the tank rinse system. That should help avoid any release of liquid into the wet bay, even with one of the vented (self-draining) backflow preventers. Why didn't I think of that?
Guess it is back to Amazon for one of the backflow preventers recommended by J&JD and Sheridany.
TJ
That makes sense, thanks, Ahhh, the part about the vented tank makes sense, not the part about being wrong.
When you connect the existing 1/2" supply hoses to the back of the new mixing valve, you may have to add a rubber washer inside the female fittings to ensure a leak-free connection.
Mine just barely clears the bay door in the full, swiveled out position. I always swivel it in before closing the bay door, however. And, remember, we are talking about different models of coach here. I don't know it that makes a difference, but it could.Paging Dr. @TJ&LadyDi we are working on the wet bay faucet change out. Do you know if the valve is left facing out if it hits the bay door or not when closing. We created a plate to put in place off the extension that sticks out from the bay wall. But I am thinking we leave it as is like you have yours.
you can clearly see we are trying to over engineer a simple mod.
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