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Thread: Tried to "deep clean" my sand filter -- failed miserably

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    Tried to "deep clean" my sand filter -- failed miserably

    I searched and searched, and couldn't find any topics dedicated to how to deep clean your sand filter. Though I found some off-hand discussions in other threads.

    It seems I skipped a step somewhere... maybe someone can help me out.

    I unscrewed the top of my sand filter. I placed in my water hose and began the 'deep cleaning'. All well and good so far.

    But the dirty water never over-flowed from the top of the sand filter ------- because it was going back into my pool thru the returns!! I could hear the water moving thru pipes, so I ran to the pool and confirmed water coming out of the returns. Yikes. Now instead of my sparkling pool, its just a tad bit cloudy.

    Anyway --- where did I skip a step? How do I stop the flow of water to the pool? Even if I put it in 'backwash' mode, the water still dribbles down the backwash tube instead of really coming out of the top of the filter. Am I missing something that's painfully obvious, and I'll be embarrassed for life for missing?
    25x12, inground (pebble tech)
    1hp pump, Pentair Triton sand filter

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    dmanb2b's Avatar
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    I could be wrong, but the "recirculate" setting should isolate the sand filter from the rest of your plumbing or you can just shut off the return line valves, if you have them in your plumbing set-up
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Re: Tried to "deep clean" my sand filter -- failed miserably

    I'm pretty sure my only two options are Backwash and 'normal'. Nothing is labeled on my PoS (inherited) setup.
    25x12, inground (pebble tech)
    1hp pump, Pentair Triton sand filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    You should have valves on the suction and return plumbing to isolate the filter. If you don't you need to plug the suction and return with winterizing plugs when you're washing the sand.
    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
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    The red valve on the left is my 'mystery valve' --- though maybe it cuts off the returns. Since the red valve on the right is for the aerator, the middle pipe doesn't have a valve because it probably goes to the waterfall, and the (similar looking, red) valve is located over there... making the red valve on the left the one to close off the returns.

    That's my best guess... but I can't get that **** thing to turn. I'm a big guy, 6'4 and 240lbs... I should be able to handle this, lol

    25x12, inground (pebble tech)
    1hp pump, Pentair Triton sand filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    Those gate valves get really stuck sometimes and require a little persuasion (i.e. large pair of pliers) to get them to move. Try to close it a little before trying to open it. Sometimes that works to free it.

    Since I dont' see a check valve you also need to close the 3-way on the suction of the pump.
    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
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    Ah nuts --- How do I close off the 3-way? It only goes from skimmer to vac-line... no 'off' type function. I guess I could technically go to the vac-line and keep the vac-hole (that sounds funny) closed in the pool (that has a little door that covers the vac-line).
    25x12, inground (pebble tech)
    1hp pump, Pentair Triton sand filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    Oppposite of the way the handle points is the off position. If you turn the handle away from the pump suction it'll turn the flow off.
    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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    Re: Tried to "deep clean" my sand filter -- failed miserably

    Hrmmm... the handle moving clockwise between 9 o'clock and 3 o'clock just varies power from vacuum and skimmer line. That's all I can do with the handle. At no point does it seem to shut off water flow from the pool. I tried it at 6 o'clock just to see, and the returns were going strong.

    BTW... is it normal that I must have the 'power' set to about 85-90% vacuum line vs 10% skimmer to have the Hayward vac to move around at a decent pace?
    25x12, inground (pebble tech)
    1hp pump, Pentair Triton sand filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    You have to put the handle in the 6 oclock position (standing looking toward the wall), without the pump on, to shut the flow off. If it doesn't shut it off you probably need to rebuild the valve.

    If by power, you mean valve, then yes, it's normal to have to have almost all the suction coming from the vac to get it to operate correctly.
    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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    Re: Tried to "deep clean" my sand filter -- failed miserably

    Sorry --- must have been getting tired last night... The handle doesn't move to the 6 o'clock position. The 'selector' does.

    The handle itself only moves between roughly 9 and 3, if you're going in a clockwise motion. So I should be able to move it to the 6 o'clock position as well? It definitely feels like it hits a 'stopper' or something when it hits those spots, so it doesn't easily go any further.
    25x12, inground (pebble tech)
    1hp pump, Pentair Triton sand filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Tried to "deep clean" my sand filter -- failed miserably

    There are stops on it but you should be able to remove one to get the handle to move to the 6 oclock position.
    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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