Question about Intex Krystal Clear Model 635 Pool Filter Pump 1500 Gph

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Intake valve make a vibrating noise after a few minutes

OK, I'll try and explain. Things were going great the pump was running and was nice and quiet, then, after a filter change the intake valve started to make a vibrating , losing air kind of noise. Now mind you I have done everything I can think of. I have swapped the intake and out valves and then I even swapped the hoses. I've take apart and have put back together a lot. Here is what happens, when we change the filter and turn the pump back on it will run great like it has been the past year and up until now, then within a few minutes there seems to be a **** in the hose and the water jet reduces flow and the humming starts. Afterwards the intake hose does a lot of moving around. Help!!! Thanks, Steve

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From what you are explaining it sounds like the pump is taking on air, which I have seen when the water level is just a tad low & the pump creates a "vortex" at the skimmer box & air is sucked in. Double check the "flap" at the skimmer to make sure it is working properly (not stuck upright)

Posted on Jul 13, 2010

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Posted on Jan 02, 2017

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