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Old 08-23-2015, 06:59 PM   #11
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Originally Posted by prairiecamper View Post
If you have tried all 8 suggestions and still no joy, it is probably the check valve at the outlet side of the pump. When the pump builds up enough pressure a pressure switch turns the pump off, however if the check valve leaks back the pressure switch won't turn off the pump. Sometimes you can seat that valve by turning off the pump and using the outside city pressure source. Also if you do that and your trailer potable tank starts filling slowly you will know that it is in fact the check valve. Good Luck

This just went to the top of my check list. Very good suggestion prairiecamper. KyDan suggested a bad pump also.

checking the check valve should be the very next item to do. I have heard of brand new pumps having check valve issues.
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Old 08-23-2015, 07:05 PM   #12
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Water Pump Question

Typically even a small leak or drip would not keep the pump running non stop. It would build pressure and then shut off. It may cycle a lot but it shouldn't run full time unless you have a decent leak. My guess is the pressure switch is bad on the pump.
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Old 08-23-2015, 07:14 PM   #13
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Typically even a small leak or drip would not keep the pump running non stop. It would build pressure and then shut off. It may cycle a lot but it shouldn't run full time unless you have a decent leak. My guess is the pressure switch is bad on the pump.
You're right it would probably cycle a lot!
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