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Thread: Intelliflow not holding prime

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    Join Date
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    Intelliflow not holding prime

    So I was raving about how a variable speed saved me so much money so a friend bought one , the problem is he can't keep it full unless at full speed, it only has one line coming into it that I believe controls 2 wall drains plumbed together then it goes to a cartridge filter out to heater then to a 3 way stuck in neutral, can air be the case at low and not high? Or are the two drains and the distance to much? Btw skimmer is on it's own pump with inground pool jet cleaners.
    Central valley, California. Inground pool built 1971, plaster, sand filter, hayward ecostar variable pump, 1.5" lines, roughly 25k gallon

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    JasonLion's Avatar
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    Re: Intelliflow not holding prime

    It is common for some air to accumulate in the pump strainer basket at lower speeds. But there should never be enough air to cause a problem. If there are problems due to air in the basket, there must be a suction side air leak. There is an article in Pool School on solving suctions side air leak issues.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Intelliflow not holding prime

    Yeah I know about the common issues the problem is it will eventually not even pull any water, I've checked the short line above ground, could an obstruction cause this ?

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    JasonLion's Avatar
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    Re: Intelliflow not holding prime

    This is almost certainly a suction side air leak. It sounds like it is a slow air leak, which is more difficult to find.

    No, a plumbing obstruction would not cause the strainer basket to fill with air.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Intelliflow not holding prime

    Please close thread, friend showed me where there looks to have had a .25 inch valve that was hooked to an ozone, anyway caped the PVC all good

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