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I have a 1/2 hp jet pump that draws lake water. We have tried and tried to prime it and get it up to presure. I have replaced the foot value but when started it reaches 20 psi and waivers down to 5 then back - can't seem to get it truly sucking. We have filled pump with water, replaced the plug loosely, let air bubbles escape and repeated literally dozens of times. The feed line in on a gradual slope up from the lake. Any further suggestions?

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I have seen little critters (looks like baby clams) make a home inside the suction pipe and on the impeller in the pump. They can cause a lot of pressure problems with just a few of them in the way.

Posted on Jul 24, 2008

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