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Open Roads Forum  >  Class A Motorhomes  >  General Topics

 > water pump replacement

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Wire Man

Wadsworth, Ohio

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Posted: 01/09/19 04:13pm Link  |  Quote  |  Print  |  Notify Moderator

lamoz1 wrote:

Ok,
I've installed a new pump. Runs quieter but the vibration of the hard
pipe is what caused the noise. Now I have another issue, once the pump is
running and I use water it pulsate. In other words it runs, stops for a second
and the runs again and continues like that. On and off constantly

I wish could add a photo also, since the plumbing seen weird to me
because the intake hose goes into the pump but a second line with a valve. The out line on the pump the attaches to this same line with the valve and then to the coach. Not sure what the purpose of this valve is.
and when it should be on or off.


I think the pulsation you are describing is air in the system, once you bleed all the air out that might stop.


Barney & Penny with our puppies Lucy & Ricky
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NHRA Drag racing is our habit ">
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Posted: 01/09/19 04:30pm Link  |  Quote  |  Print  |  Notify Moderator

If it cycles on and off WHILE THE FAUCET IS OPEN then the pump is capable of providing a larger volume of water than the faucet can consume. So the pressure builds until the cutoff point, the pump shuts off, the pressure drops because the faucet is running and the pump turns back on. The simplest way to solve this is with an accumulator.


1999 Newmar MACA 3796 F53 6.8L
2016 Ford Edge Sport
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