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Thread: Sight Glass Leaking

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    Join Date
    Aug 2014

    Sight Glass Leaking

    Please help! My husband opened our pool and I noticed that the sight glass is leaking when I'm trying to backwash. It has no water in it during normal filter mode. He said that he installed everything the exact way that it was last year, but something is definitely wrong. We have a Triton Sand Dollar filter with a hayward pump.


  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Sight Glass Leaking

    There should only be water in it when you are backwashing ... so it does not matter if it is empty in filter mode (that is normal).

    Also, I would not let a little leaking bother me since it will only happen while you are backwashing.
    Jason, TFP Moderator
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  3. Back To Top    #3

    Join Date
    May 2013
    Long Island NY

    Re: Sight Glass Leaking

    Mine leaked a little and I just unscrewed the glass jar and put a few wraps of Teflon tape on it and it stopped the leak.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

  4. Back To Top    #4
    BoDarville's Avatar
    Join Date
    Jun 2012
    DFW, Texas

    Re: Sight Glass Leaking

    I have some slight leaking near the backwash sight glass. It's been that way for a couple of years. Wouldn't sweat it. One tip I can give you is, look for a drain plug on the backwash pipe. If you have one, lubricate it with a spray lube or a drop or two of oil and give it a twist. In winter, make sure that all water is drained from the backwash pipe to prevent freezing. The small leak I have was likely caused by freezing water in the backwash pipe before I became educated about pool management.
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  5. Back To Top    #5

    Re: Sight Glass Leaking

    There should be a rubber washer in the threaded hole. You can use a regular hose washer. The larger flat red washers fit best.
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