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Thread: DE backing up through the Main Drain/Skimmers

  1. Back To Top    #1

    Join Date
    May 2008
    Location
    Long Island, NY
    Posts
    151

    DE backing up through the Main Drain/Skimmers

    When my pump shuts off, DE backs thought the pump and gets into the pool via the main drain (or skimmers if I shut off the main drain). What could be causing this? I read that it may be a suction side leak causing a air pocket in the filter that expands when the pump is turned off. I had one and repaired it. I still have the problem. I do not have any air in the filter & pump basket. Any other suggestions?
    Pool Details: 25,440 Gal IG Vinyl 21x40 Mountain Pond (Graphex)
    Filter: Hayward Micro-Clear DE (48 Sq Ft)
    Pump: Hayward SP2603VSP VS Super Pump
    SWG: Circupool Si45
    Cleaner: Pentair Kreepy Krauly Prowler 820

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,090

    Re: DE backing up through the Main Drain/Skimmers

    Is your filter below the pool water level? Pressure reading high? Have you bled the filter right before shutting the pump off?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    May 2008
    Location
    Long Island, NY
    Posts
    151

    Re: DE backing up through the Main Drain/Skimmers

    The filter is way above water level (IG pool). I just purchased the house last year. The filter has ran about 9 PSI with fresh DE. A few months ago it creeped up to 20 PSI, I back washed, put in new DE still 20 PSI. Then I cleaned the grids & replaced 1 of them, down to 18 PSI. I am at a loss here. I think I may drill and tap some more holes for more gauges. I want one right at the discharge of the pump, so I can see what the pump is doing when I am in recirc. This will tell me if it is a filter problem or return piping.

    I believe that part of the problem is the liquidator. When the pump shuts off, the level in the liquidator drops introducing air into the pump. (I have the liquidator piped into the drain of the pump). I am looking into installing a solenoid valve so the line on the liquidator will close when the pump is off.
    Pool Details: 25,440 Gal IG Vinyl 21x40 Mountain Pond (Graphex)
    Filter: Hayward Micro-Clear DE (48 Sq Ft)
    Pump: Hayward SP2603VSP VS Super Pump
    SWG: Circupool Si45
    Cleaner: Pentair Kreepy Krauly Prowler 820

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