Should the fresh water transfer pump automatically shut off?

[Bryce C]

I just installed a new transfer pump, but when the water box fills up the float valve cuts off the water supply so it doesn't overflow, but the transfer pump just keeps running. Seems like if it just keeps pumping without actually moving water through it then it would fail pretty quickly. I can see at the bottom of the water box a float switch, I suppose it tells the transfer pump to turn on when the water level gets low enough? This setup doesn't make sense to me unless there would also be a float switch to cutoff the transfer pump when the water box doesn't need any more water as well. Or are these transfer pumps designed to just keep running even when they are moving no water through them for periods of time? If so what is the float switch for at the bottom of the water box?

 

[Dwain Ray]

I just installed a new transfer pump, but when the water box fills up the float valve cuts off the water supply so it doesn't overflow, but the transfer pump just keeps running. Seems like if it just keeps pumping without actually moving water through it then it would fail pretty quickly. I can see at the bottom of the water box a float switch, I suppose it tells the transfer pump to turn on when the water level gets low enough? This setup doesn't make sense to me unless there would also be a float switch to cutoff the transfer pump when the water box doesn't need any more water as well. Or are these transfer pumps designed to just keep running even when they are moving no water through them for periods of time? If so what is the float switch for at the bottom of the water box?

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To tell you the truth, i have no idea of what you have or how it works. You've only given about ⅓ the information necessary to assist you. But generally speaking virtually all transfer/ rv pressure pumps use or on have incorporated a pressure switch. For instance most rv pumps have a switck built in to the end of the pump . The pump turns on when the pressure drops below a set pressure and turns off when it reaches its high limit generally speaking preset somewhere aroumd 10psi on 35psi off . Some pumps like on the prochem waterpond do not have a built in switch rather they use a commercial/ residential well pump switch that is adjustable. By your description i believe you have a pump that requires an external pressure switch but given the limited information it's my best guess

 

[Bryce C]

Ok thank you. It is an Aquatec 45 psi 3.3 gpm 12 volt 9 amp transfer pump. There is a 1 gallon pressure tank that was not connected. I called a friend and he said that transfer pump I have just constantly runs, when it detects back pressure it just spins freely in its housing and when the water is allowed to move it engages and starts pumping again. But it runs constantly and should be fine. The pressure tank isn't needed with this setup. And the float switch at the bottom of the water box is a safety that cuts off the main water pump (not the transfer pump) if water runs too low.

 

[Bryce C]

But now I am running it and getting a constant reading on the pressure gauge at the machine that adjusts up and down accordingly when I turn the regulator. However I have hardly anything squirting out of my wand attached to the solution line. The quick disconnects seem fine, but I don't know. For all I know there could be hoses run incorrectly to the valve. I just disconnected them and reconnected them in the position they were previously in.

 

[Bryce C]

 

[Bryce C]

I suppose now I need to look at the hoses from the pump to the valve and the to the solution line and start thinking about how it should work and if the way it is hooked up makes sense. Dang it, there's a lot of hoses and bypasses and odd things back there. The schematic from Hydramasters manual isn't very helpful as it doesn't even show everything that's actually there. Nor does it even look realistic.

 

[Nate The Great]

I'd check your quick connects first.. Then go from there.. Put an open q/c on the front of the machine.. Does it have flow.. Go from there

 

[Bryce C]

Thanks Nate, please check my other thread with videos.