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Thread: Suction side leak . . . Found in Pump Drain Plugs

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    TomC is offline PF Supporter Thread Analyst TomC 0
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    Default Suction side leak . . . Found in Pump Drain Plugs

    Hi guys. Since the pool was opened a week or so ago, I have been getting air in my filter. I release the air once or twice a day. The pump basket has no air in it. I've cleaned that whole assembly and lightly lubed the gasket.

    When the guys opened the pool, the pump was extremely loud, which was caused by a loose drain plug. I discovered this from another thread on the pool forum. Is there a second drain plug? I've viewed shcematics of my pump, and it's not clear from the diagram if there is more than one drain plug on the pump. I'm laid up in bed with a bad back right now, so I can't check for myself. Thanks for any help.

    Tom
    20'x42' L' 41K gal IG vinyl pool; trichlor feeder, bleach; Pentair 420 cartridge filter; Pentair Whisperflo 1.5hp 2 speed pump; hrs; TF-100, CYA test; city;PF:2.9

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    TomC is offline PF Supporter Thread Analyst TomC 0
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    Default Re: Suction side leak, need some help

    Okay, so I found the second drain plug on the pump, right near the first one. I tightened it up, it went about a half of a turn. Do you think that was enough to cause the air problem in my filter? Guess I'll find out soon enough.

    Tom
    20'x42' L' 41K gal IG vinyl pool; trichlor feeder, bleach; Pentair 420 cartridge filter; Pentair Whisperflo 1.5hp 2 speed pump; hrs; TF-100, CYA test; city;PF:2.9

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    Watermom is offline SuperMod Emeritus Quark Inspector Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars
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    TomC is offline PF Supporter Thread Analyst TomC 0
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    Default Re: Suction side leak, need some help

    Okay, so I went out to the filter this morning and bled air for about 10 seconds, so tightening up that second drain plug didn't seem to help. I saw another member mention something about shaving cream as a diagnostic aid. Can anyone tell me how to use this technique? Because we've had so much rain lately, I didn't check the o-rings on the drain plugs, guess I'll do that this weekend.

    Tom
    20'x42' L' 41K gal IG vinyl pool; trichlor feeder, bleach; Pentair 420 cartridge filter; Pentair Whisperflo 1.5hp 2 speed pump; hrs; TF-100, CYA test; city;PF:2.9

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    Default Re: Suction side leak, need some help

    If you spread shaving cream on places where you suspect suction leaks, you can see if it gets sucked in to the joint.

  6. #6
    TomC is offline PF Supporter Thread Analyst TomC 0
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    Default Re: Suction side leak, need some help

    Thanks Dave, I'll give it a go. Should I just put it on the pipe unions, or between the wet end and the dry end of the pump too?

    Tom
    20'x42' L' 41K gal IG vinyl pool; trichlor feeder, bleach; Pentair 420 cartridge filter; Pentair Whisperflo 1.5hp 2 speed pump; hrs; TF-100, CYA test; city;PF:2.9

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