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Thread: Sand in the return line of the pool skimmer causing low pressure

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    Poolipop's Avatar
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    Question Sand in the return line of the pool skimmer causing low pressure

    Hello,

    I have what I believe is sand in the return line of the pool skimmer.

    I have 2 inlets to the pump (skimmer and drain). Everytime I shut off the drain inlet, there is not enough flow from the skimmer to keep the pump pressurized with water. Although, if I shut off the skimmer inlet, there is enough pressure to keep the water flowing.

    When I clean the pool, I turn the sand filter to waste and clean the sand and other things from the pool, but after this event, there is always less flow from the skimmer, since that is where my manual vacuum is hooked up through.

    How do i clean the sand out from the skimmer return pipe?

    Is there something I can stick in-between the skimmer inlet and my vacuum line (Like a filter or bag) to keep debris and sand from entering the return line to the pump?
    26,000 Gallon IG (in ground) Vinyl Pool
    Filter: Hayword S220T Sand
    Pump: Hayword (1 hp)
    CircuPool Si-45 Plus SWG (Installed myself)
    TF-100 Kit w/ magnetic stirrer

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    Poolipop's Avatar
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    Re: Sand in the return line of the pool skimmer causing low pressure

    Also forgot to say, I am buying a robot cleaner this year as well to help me and a pool cover for the winter.
    26,000 Gallon IG (in ground) Vinyl Pool
    Filter: Hayword S220T Sand
    Pump: Hayword (1 hp)
    CircuPool Si-45 Plus SWG (Installed myself)
    TF-100 Kit w/ magnetic stirrer

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    Poolipop's Avatar
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    Re: Sand in the return line of the pool skimmer causing low pressure

    Do I need to call the roto rooter?
    26,000 Gallon IG (in ground) Vinyl Pool
    Filter: Hayword S220T Sand
    Pump: Hayword (1 hp)
    CircuPool Si-45 Plus SWG (Installed myself)
    TF-100 Kit w/ magnetic stirrer

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    Mod Squad Jimrahbe's Avatar
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    Re: Sand in the return line of the pool skimmer causing low pressure

    P,

    Seems to me it would take a massive amount of "sand" to plug up the skimmer line. But since you use this same port to vacuum the pool, I can see how it might have something larger stuck in there.

    The first thing I would do is try a "drain king". They sell them at Home Depot or Lowes. The look like this..... http://www.acehardware.com/product/i...1-23c008e43201

    I would put it into the pump end first forcing water back toward the skimmer. With the vacuum hose removed of course. Then try from the skimmer to the pump with the pump lid removed.

    As I typed this, I had a thought.. When you are having this problem, I "assume" that you do not have the vacuum hose attached. Is this correct?

    I have a robot myself and highly recommend them.

    Thanks for posting,

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    Re: Sand in the return line of the pool skimmer causing low pressure

    I am not sure you have sand. sand would flow into the pump and then get caught in the filter. Why do you think it's sand?

    Have you tried flushing the suction line by sticking a water hose into the suctioon line at the pump lid?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Sand in the return line of the pool skimmer causing low pressure

    I actually have tried the drain king last year, but the skimmer line always seems to easily get stopped up. It is a frustraing experience to try and clean your pool only to have a loss of pressure 5 minutes after you being sucking up the algae and sand. I spent over an hour trying to get the line clear last year and while it worked, it quickly was clogged again.
    26,000 Gallon IG (in ground) Vinyl Pool
    Filter: Hayword S220T Sand
    Pump: Hayword (1 hp)
    CircuPool Si-45 Plus SWG (Installed myself)
    TF-100 Kit w/ magnetic stirrer

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    Re: Sand in the return line of the pool skimmer causing low pressure

    Well, enough debris can certainly plug any line but that would be a LOT of debris.....something is not normal.

    Perhaps a better explanation of what leads to this suction line clogging up may give someone a clue as to the problem.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Sand in the return line of the pool skimmer causing low pressure

    Has anything been sucked past the skimmer basket? It's possible something is lodged in a 90 degree corner. Have you tried a shop vac to blow skimmer from pump connection? If there is truly something lodged in there, you will see only a trickle from the skimmer. Maybe borrow a cyclone blower designed for closing pools it moves a larger volume of air.

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    Re: Sand in the return line of the pool skimmer causing low pressure

    Could be a possibility, I have a few kids. I can buy a waterproof endoscope and find out for sure ; )
    26,000 Gallon IG (in ground) Vinyl Pool
    Filter: Hayword S220T Sand
    Pump: Hayword (1 hp)
    CircuPool Si-45 Plus SWG (Installed myself)
    TF-100 Kit w/ magnetic stirrer

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    Poolipop's Avatar
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    Re: Sand in the return line of the pool skimmer causing low pressure

    Alright, I bought this from Harbor Freight for $8
    http://www.harborfreight.com/medium-...der-99942.html

    A bunch of debris that I vacuumed up came out and unclogged the pipe for now. For future use, I will be using the following things to help me.

    And I am buying this for inline with my manual vacuum https://www.amazon.com/gp/product/B0...=ATVPDKIKX0DER

    And buying these socks for fine debris https://www.amazon.com/gp/product/B0...A1Y1UD1H7QRJHZ
    26,000 Gallon IG (in ground) Vinyl Pool
    Filter: Hayword S220T Sand
    Pump: Hayword (1 hp)
    CircuPool Si-45 Plus SWG (Installed myself)
    TF-100 Kit w/ magnetic stirrer

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