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Thread: Secondary Filter looses suction and water only when vacuuming

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    Join Date
    Jun 2016
    Location
    Louisville, KY
    Posts
    6

    Secondary Filter looses suction and water only when vacuuming

    We have an Intex Krystal Clear Sand Filter 2800 GPH Pump Flow Rate.It filters just fine but when vacuuming the secondary filter runs out of water and suction is lost almost immediately and it sounds as if the pump is straining. Have checked to see if the hose is plugged and no plugs. Only happens when vacuuming. Cannot figure out what is going on.

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    Join Date
    Jun 2013
    Location
    Otsego, Michigan
    Posts
    8

    Re: Secondary Filter looses suction and water only when vacuuming

    Do you prime the vacuum line before hooking it up? Try submersing the hose to get any air out of it first before hooking it up if you arent doing so first.

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    Join Date
    Jun 2016
    Location
    Louisville, KY
    Posts
    6

    Re: Secondary Filter looses suction and water only when vacuuming

    Quote Originally Posted by bizrad8381 View Post
    Do you prime the vacuum line before hooking it up? Try submersing the hose to get any air out of it first before hooking it up if you arent doing so first.
    Yes, sure do. Even thought there might be a blockage in a hose so disconnected each one and tested. Only happens when I vacuum. Driving me crazy trying to figure it out.
    Above Ground Pool, 21 foot by 48", Doughboy. Using a, INtex Krsytal Clear Sand Filter Pump for Above Ground Pools, 29800 GPH Flow Rate, 110-120V with GFCI

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    Join Date
    Jul 2015
    Location
    Port Neches, TX
    Posts
    53

    Re: Secondary Filter looses suction and water only when vacuuming

    This is a shot in the dark, but if you have the Intex plunger valves, they do have a small grey nipple behind the valve and before the collar, with rubber on top, that will suck air when trying to vacuum. We just cover ours with electrical or duct tapex10747E.jpg_1_19.jpg.pagespeed.ic.dxjmPCzrO1.jpg and it works fine.
    22' x 52" Intex UltraFrame ABG, 10,500 gallons
    using TF-100 test kit
    Krystal Klear 633T Filter Type B pump - 2,500 GPH
    Intex wall-mount surface skimmer

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