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Thread: Low pressure on return side

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    Join Date
    Aug 2013
    Location
    Ontario Canada
    Posts
    15

    Low pressure on return side

    This just started. Pump runs about 11/12 normally. Now, lots of suction at the skimmer. Low pressure at return jets and the pump is running at 5/8PSI and surging. Took the pump apart, lubed the rings, impeller turning fine and started it up, no change. Back washed filter and glass is clear. Must be a clog, but where. FYI solar heaters in line which are off. Easy solution please, just heading away on vacation & house sitter coming over. Not relaxing!

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Low pressure on return side

    A surging pump is almost always an air leak on the suction side. Check that the pump strainer basket lid is sealing properly and that there is enough water in the pool so no vortex forms in the skimmer that could draw air in.
    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

  3. Back To Top    #3

    Join Date
    Aug 2013
    Location
    Ontario Canada
    Posts
    15

    Re: Low pressure on return side

    Had to break down and have the pool guys over as I was heading away on vacation with housesitter soon to arrive. There was a leak at the pump union. Can't believe I couldn't figure it out myself. Not bad tho, only $115. I guess they have the luxury of pressurizing the lines to help them pinpoint the area. Live and learn. She's running tickety boo now.

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