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Thread: Sand shooting thru return jet.

  1. Back To Top    #1

    Join Date
    May 2016
    Location
    Marshfield WI
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    12

    Question Sand shooting thru return jet.

    I just bought a house with a pool last fall, and now I'm finishing up slamming the pool because it was green. Its been a week and the water is looking clear although it is still a little cloudy. I shut off my pump to rinse out the pump's skimmer basket and when I turned the pump back on, the jet shot out a brown cloud. I found out that it shoots out this brown cloud every time I shut the pump off and then turn it back on. I caught some of the brown cloud in a sock and found out that it is my filter sand.

    Some background, last fall when I closed the pool I found out that the PVC pipe in the sand filter was broken and all of the sand was gone. I replaced the PVC pipe and put brand new sand in the filter.

    Some ideas I have are: A bad lateral or I didn't install the new PVC pipe correctly. Is there any chance the multi-valve could be the problem? I'm debating between replacing the laterals or replacing the entire multi-valve assembly.

    Any thoughts on what to do to fix this?
    14600 gallon above viynl ground pool, sand filter, and Zodiac Clearwater SWG.

  2. Back To Top    #2

    Join Date
    Aug 2010
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    Dallas, TX
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    Re: Sand shooting thru return jet.

    Bad lateral or laterals or other elements not fully connected, or broken manifold are the likely issues. I am pretty sure a bad valve won't do it.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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  3. Back To Top    #3

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    May 2016
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    Marshfield WI
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    Re: Sand shooting thru return jet.

    Sorry, but I'm new to pool ownership. What part is the manifold?
    14600 gallon above viynl ground pool, sand filter, and Zodiac Clearwater SWG.

  4. Back To Top    #4
    Texas Splash's Avatar
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    Jun 2014
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    South-Central Texas, Marion/San Antonio
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    Re: Sand shooting thru return jet.



    In this pic you see the vertical standpipe that goes down to the manifold assembly where the laterals (fingers) are attached.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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  5. Back To Top    #5

    Join Date
    May 2016
    Location
    Marshfield WI
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    12

    Re: Sand shooting thru return jet.

    I bought a new manifold and lateral assembly and replaced the old one. I think the probably was that I wasn't back washing and rinsing the filter when it got air in it. I found out that when I vacuumed the pump didn't stay completely full with water and some air got in it. When I pulled the vacuum off some of the dirty water in the filter got blown back into the pool while the pump got a blast of new water. If I turn the pump off before I pull the vacuum off, then backwash and rinse, no dirty water gets sent into the pool when I turn the pump back on.
    14600 gallon above viynl ground pool, sand filter, and Zodiac Clearwater SWG.

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