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Thread: Sand filter/pump and return water pulsing.

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    Join Date
    Jun 2015

    Sand filter/pump and return water pulsing.

    Finished hooking up my upgrade sand filter system last night. Great suction and return BUT when I hook up my creepy Crawley lil shark everything starts pulsing. It's seems like it is sucking air from somewhere and the water coming out return into pool is inconsistent. Hoses at the filter are swinging from the pulsing. Any ideas? Obviously something with the Shark.
    Garner, North Carolina, Intex 18'x45" 6,423 gallons. Vinyl, Krystal clear model 635T filter pump 1500 GPH. SWG with ECO. New pool as of July 2015, Taylor test kit . June 27 2016 I just upgrade my little filter to a Hayward VL series sand filter with pump.Pentair Kreepy Crawley Shark.

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    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Tallahassee, FL

    Re: Sand filter/pump and return water pulsing.

    How are you adding water to the hose to keep it from getting air in it? That is a learned thing for sure. It takes some practice to fill the hose AND get it on the plate with out introducing air in to the line.

    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit, Become a TFP supporter!

  3. Back To Top    #3
    Chasmengr's Avatar
    Join Date
    May 2016
    Omaha, NE

    Re: Sand filter/pump and return water pulsing.

    1) The Shark has a pulsing valve in it to help it navigate in circles around a pool; hold that valve still (stop its pulsing) underwater to see if that's the source of your pulsing. If so, the pulsing is normal by design.

    2) If neither the Shark's valve nor air in the vacuum line is causing the pulsing, try using fewer hose lengths on the shark. Start with just one length to see if the pulsing stops while holding the Shark's valve. If pulsing is not present with one length, add one more length at a time until pulsing begins again. Why? Because your pump's ability to suck properly may be overcome with additional fluid friction added by the Shark and its hose.
    Chas & Cheryl (first-time pool owners)
    Radiant Metric Oval AGP 16'x32'x52" (first fill: early June 2016)
    Pentair: Clean&Clear 150 Cartridge, OptiFlo 1.5 Hp 2-spd, and 320C Feeder (all mounted below water level), Taylor K-2006 & SpeedStir
    installation pics (2015-2016)

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