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Old 09-05-2012, 16:43   #16
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Boat: Custom Ketch Asperida
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Re: Fresh water pump noise

I made a 540 degree loop of rubber hose between the pump and the tank. It helped a lot but it is still a little bit noisy. I think the problem is in the location of the pressure sensor. In the new design Groco put the sensor right after the pressure tank. My pump is an older one and the sensor is an integral part of the pump (before the tank). At the end of the pumping cycle the pulses of pressure falsely trigger the sensor which in turn turns the pump on and off and this is the source of noise. The best solution would be to use an external pressure regulator and bypass the built in one . My thanks to everybody for their help in solving this problem.

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Old 09-05-2012, 16:49   #17
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Boat: CS36Merlin, "La Belle Aurore" Ben393 "Breathless"
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Re: Fresh water pump noise

I like a noisy fresh water pump. Know when it's running. Don't see why it bothers you. It doesn't run when you're sleeping does it?

Rick I
Toronto in summer, Bahamas in winter.
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Old 09-05-2012, 16:59   #18
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Re: Fresh water pump noise

[QUOTE=Tristan;946831]The pump is mounted on flexible mounts - like an engine but smaller and more flexible.
The connection from the pump to the tank is a rubber hose. I will check the tank tomorrow. What initial air pressure should I set in the tank to if the pump is set for 40 psi ?

I believe the rule of thumb is half of system pressure. A good routine maintenance check is to burb the Schraeder valve occasionaly to check for water in the air side.

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noise, water

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