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Thread: Dirt from return when switching pump from low to high?

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    JesseWV's Avatar
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    Dirt from return when switching pump from low to high?

    So this morning I switched the pump from low to high to do some vacuuming and immediately fine brown dirt started coming out of the return. In horror I turned it off immediately. I just replaced the gasket in the multi-port last year. What could be causing this?
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    Re: Dirt from return when switching pump from low to high?

    When did you last clean/backwash your filter?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    JesseWV's Avatar
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    Re: Dirt from return when switching pump from low to high?

    Quote Originally Posted by duraleigh
    When did you last clean/backwash your filter?
    2 days prior. I backwashed after vacuuming for the first time this season.

    Then I adjusted TA, pH, added CYA to the filter and brought it up to shock level. I let it run for 1 day on high. The water looked great the next day so I turned the pump down to low. It ran for another whole 24 hours on low until this morning.

    I went out today to do some finishing touches with the vacuum and noticed the dirt when I flipped to high to hook up the suction plate.
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    Mod Squad Bama Rambler's Avatar
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    Re: Dirt from return when switching pump from low to high?

    It may have been some residual in the line that settled out on low speed but the velocity of high speed was enough to carry it out.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    JesseWV's Avatar
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    Re: Dirt from return when switching pump from low to high?

    Quote Originally Posted by Bama Rambler
    It may have been some residual in the line that settled out on low speed but the velocity of high speed was enough to carry it out.
    I let it run for a good 30 seconds. It was just continuously shooting a medium brown jet of dirt into the almost sparkly pool. I'm starting to wonder if I'll even be able to use the low speed on my filter.
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    JesseWV's Avatar
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    Re: Dirt from return when switching pump from low to high?

    Does "high rate" sand filter mean I always need to run on high?
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    guamguy's Avatar
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    Re: Dirt from return when switching pump from low to high?

    I had the same problem last year. I think my sand was channeled, so I deep cleaned the filter by removing the top and shoving a garden hose down through the sand and moving it around, being careful of the laterals. You need to let the hose run until the water overflowing from the filter runs clear. Then do a good backwash/rinse. That solved the problem. Good luck
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

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    Mod Squad Bama Rambler's Avatar
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    Re: Dirt from return when switching pump from low to high?

    Quote Originally Posted by JesseWV
    Does "high rate" sand filter mean I always need to run on high?
    No it just means it's capable of high flow rate. It doesn't mean you have to have a high flow.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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