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Thread: vacuuming and pump prime

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    vacuuming and pump prime

    hello, I am new to the forum, though not new to the pool school. this site and its members has helped us to go from a green swamp to a beautiful summer get-away right at home.
    however, while using the vacuum for the first time this year, we lose prime in the pump. i don't see any air leaks in the hose, and suction is great. we have a new vacuum head and the opening steps down to a smaller connection than our previous this restricting water flow? can this cause me to lose prime?
    16g, IG concrete, 1970s, Hayward 200 sand, 1.5 HP

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: vacuuming and pump prime

    If you're losing prime there has to be air getting into the system somewhere. It could be anywhere along the system and hooking up the vacuum just exacerbates it. Check to see if there is air in the pump basket while the vacuum is hooked up.

    The normal culrpits are the basket lid o-ring seal and the basket drain plugs. It could also be the vacuum adapter plate if you use one.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: vacuuming and pump prime

    Is it loosing prime when you first hookup the hose, or at some point after you've started vacuuming and then it suddenly stops?
    -- Courtice, Ontario, Canada. "Cabo San Backyardo"
    12x16 3/4 inground - Hayward 3400VSP, Sand Filter, Rooftop 4x20 solar w/ Hayward GL235 automation.
    Previously installed at a neighbors, before, during & after photos HERE!

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