Could you use the winterizing hose to do this? Just a thought.
On newer rigs with the Anderson 4-way valve, to winterize, the valve is set to Winterize/Sanitize and a hose is connected to the city water inlet, with the other end in the antifreeze jug. The pump suctions antifreeze through the city water inlet and into the coach plumbing. It doesn't have a path to fill the fresh tank when in that mode.
And when the valve is set to tank to fill the fresh tank, the pump is not in the loop.
If you wanted to use the existing water pump to suction fresh water and route it to the fresh tank, you'd need to add a new water line from the pump output side to the fresh tank input side, with a 3-way valve to shut off flow to the plumbing fixtures while opening flow between pump and tank. Then put the 4-way valve into Winterize/Sanitize mode and suction water in and route it to the tank. Ideally, the handle for the new valve would be in the UDC if there were space.
David,I know this is an oldish thread, but I had the same thought that Dan outlined below, and I'm planning to do exactly this:
But I don't think you need a 3-way valve to shut off flow to the plumbing fixtures, do you? Wouldn't just a standard 2-way ball valve in the new diversion line work? If the new valve is "off", it's as if the diversion line isn't there, and the plumbing works the "normal" way. And if the new valve is "on", as long as all the fixtures are off, water will flow through the diversion line and into the tank when the pump is on. In other words, you don't need to shut off the flow to the fixtures, because the fixtures themselves are already off and no water is flowing through them. (For that matter, if a fixture was on, water would flow to both the fixture and the tank--workable though not very efficient.)
Is that right, or am I missing something?
David
David,
I think the key is that you need a new line from the pump output. One way to do so would be to run the pump output to a 3 way valve and have the outputs of the valve feed either the Anderson Valve or the fresh tank depending on how it's set. Another way would be to add a Tee to the pump output line with a new line teed into the tank feed, and a ball valve on that line. The 3 way valve in effect is both tees and the ball valve.
I think either one would work. Do whatever works best for you.