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Thread: dirty water from return jets

  1. Back To Top    #1
    bof's Avatar
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    dirty water from return jets

    This problem has recurred three times now.
    I run my pool with water from the balance tank through the filter and back to the return jets. When the balance tank became low I switched to the main drain. When the motor kicked in a cloud of "dirt" came from the jets, this took about three days to clear. After this I changed from the balance tank to the main drain more often. But if I forget or just get lazy when I have had the main drain off for about a week the ploom occures. Any sugestions on how this occures


    Thanks in advance.
    Living in Cyprus
    In ground overflow pool tiled 12m X 4m 19507 Us gals 16243 Imp gals
    1 Kw motor 15 cu m per min Sand filter
    I thought I saw the light at the end of the tunnel but it was just some PERSON with a torch walking toward me.
    I started out in life with nothing and I still have most of it left.

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    mas985's Avatar
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    Re: dirty water from return jets

    What is the filter pressure in each "mode"?

    I would assume that the balance tank has a much lower water level than the pool?

    What is the size/model of your pump?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    bof's Avatar
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    Re: dirty water from return jets

    Hi
    The filter pressure is .75 bar for the main drain and balance tank.
    Yes the balance tank water level is lower than the pool even when full.
    The pump is a 1kw
    Living in Cyprus
    In ground overflow pool tiled 12m X 4m 19507 Us gals 16243 Imp gals
    1 Kw motor 15 cu m per min Sand filter
    I thought I saw the light at the end of the tunnel but it was just some PERSON with a torch walking toward me.
    I started out in life with nothing and I still have most of it left.

  4. Back To Top    #4
    mas985's Avatar
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    Re: dirty water from return jets

    Then the filter pressure should be higher when on MD vs the balance tank.


    My theory is that because the water level is higher for the MD, head loss is lower and flow rates are higher pushing the dirt through the filter. However, that doesn't explain why the dirt is getting pushed through the filter. Sand filters will allow very small debris through the filter normally but it is very small debris (< 40 microns). Did you just get done with SLAM for algae?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    bof's Avatar
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    Re: dirty water from return jets

    Hi
    No did not slam but I did find that if I removed the pump filter lid water would feed into the filter chamber, I assumed that it was coming from the sand filter as all the valves were closed. On further investigation I was able to nip up the nuts on top of the sand filter cover. This seems to have cleared the problem.

    Thanks for your help, much appreciated.
    Living in Cyprus
    In ground overflow pool tiled 12m X 4m 19507 Us gals 16243 Imp gals
    1 Kw motor 15 cu m per min Sand filter
    I thought I saw the light at the end of the tunnel but it was just some PERSON with a torch walking toward me.
    I started out in life with nothing and I still have most of it left.

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