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Old 06-03-2014, 02:45 PM   #1
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Fresh water pump problem.

I have an Elkridge 34QSRL and am having a problem with the water pump. The pump comes on when any faucet is opened or the toilet flushed. There seems to be a lot of air in the line at times so you would think that it is sucking air on the intake line or a leak on the output. Water pressure is not that great either. The thing is that the pump will shut off when the faucet is shut off and hold pressure. It does not cycle quickly like it is losing pressure when shut off and has to build it back up again. Sometimes it will not shut off unless you open up both faucets to get a strong flow then shut them of. The pump will then build pressure and shut off and hold pressure. I'm thinking that if I have a leak anywhere then the pump would not shut off and hold pressure. Suggestions or ideas?

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Old 06-03-2014, 03:50 PM   #2
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It's a 'pressure on demand' water system. The pump senses lower pressure when a faucet is opened and pumps water until faucet is closed and pressure can build again. It then shuts off until the next time. Sometimes the check valve that is between the pump and the water tank will leak, causing pump to detect low pressure as water leaks back through the check valve into the tank. Often the check valve is built into the pump or right where line from tank enters the pump.

There is usually a strainer or filter in the line between the tank and the pump. Have you ever removed it and cleaned it? Also, bad water flow is often the result of a clogged screen in the aerator in the faucet. Unscrew, take apart, and clean it out. Check that any outside shower or other valves are in the closed position.

Usually the only air in the system happens when first filling water heater after it's been drained for winterizing. In that case, you reset heater bypass from winter setting to in use setting and turn on hot water to fill tank, push air down line and out faucet. It will bubble and pulse until air is flushed out, then go to steady stream. If you have air continued after that, you might have an issue with a valve partly open to allow air into system.


Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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Old 06-03-2014, 05:05 PM   #3
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Maybe I didn't make myself clear. I know how the demand pump works. I'm saying that with the air I am getting that one would think that it was sucking our leaking air in the lines yet it shuts off and holds pressure. The w3hole system is full including hot water tank and fresh water tank. All filters and strainers are clean. All valves are shut as they should be.The water system works fine on city water.
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Old 06-03-2014, 07:47 PM   #4
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Do you have a gravity fill fresh water tank? If not, check the lever that directs (deverts) the city water into the fresh water tank. It might not be in the correct position.

You are no longer hooked to city water...correct?
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Old 06-03-2014, 07:56 PM   #5
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Sometimes when it has been out of water for a bit, there seems to be a bit of air lingering in the lines. It should fix itself shortly. Or should I say we have had that happen, and after a short time the issue has resolved itself.
Judy & Ralph, w/Molly (the Westie) & Sadie (the Fourche Terrier)
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fresh water, water, water pump

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