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Thread: Check for restrictions

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    Join Date
    May 2012
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    Memphis Tn
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    Check for restrictions

    I don't seem to have the flow that I had last year and the water just will not clear up. What do you use to check for restrictions? I have 1-1/2" supply and return PVC pipe.
    Esther Williams 18'x33'x50" oval above ground
    Filter/pump being changed at this time
    Pentair model 320 auto chlorine feeder
    Taylor TF-100 test kit

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
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    Re: Check for restrictions

    Is your filter pressure higher or lower than normal?

    Have you backwashed your filter recently? Could be clogged filter and is indicated by higher than normal filter pressure.

    Did you recently use your vacuum on a lot of debris? Could be clogged impeller or suction line and is indicated by lower than normal filter pressure.
    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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    Re: Check for restrictions

    Pressure is normal. I backwash daily and after each vacuum. I have not taken the pump apart, but I can feel the impeller through the strainer and do not feel debris on the impeller. I change the filter sand last year.
    Esther Williams 18'x33'x50" oval above ground
    Filter/pump being changed at this time
    Pentair model 320 auto chlorine feeder
    Taylor TF-100 test kit

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    mas985's Avatar
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    Re: Check for restrictions

    I don't seem to have the flow that I had last year and the water just will not clear up.
    When I read this, I took it mean that your flow rate had decreased but if the pool just won't clear, that is either a chemistry issue or it could be that debris is passing through the filter due to an issue with the filter. If the pressure is the same, the flow rate should be the same as well.

    If you can be a bit more descriptive on what you mean by "will not clear up" (e.g. cloudy, green, can't see bottom, etc).

    Some history might help too. For example, did you just open the pool?

    Lastly, can you see any debris coming back out of the returns?
    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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    Memphis Tn
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    Re: Check for restrictions

    Quote Originally Posted by mas985
    I don't seem to have the flow that I had last year and the water just will not clear up.
    When you wrote this, I took it mean that your flow rate had decreased but if the pool just won't clear, that is either a chemistry issue or it could be that debris is passing through the filter due to an issue with the filter. If the pressure is the same, the flow rate should be the same as well.

    If you can be a bit more descriptive on what you mean by "will not clear up" (e.g. cloudy, green, can't see bottom, etc).

    Some history might help too. For example, did you just open the pool?

    Lastly, can you see any debris coming back out of the returns?
    Last year the water comming from the eye/return seemed to have more pressure. It almost hurt to put my arm in front of it.

    I opened the pool about 2 months ago.

    As for it not clearing up, the water is cloudy after 60 plus days of constant filtering and vacuuming. I have SHOCKed it twice in the same 60 days.The water has a light greenish/whiteish look. I can barley see the brush at the bottom of the pool while vacuuming and can see where the vacuum has been, but I can not see the pattern in the liner at the bottom.

    I do not detect any debris comming from the return.

    I recieve my test kit yesterday and this morning the chlorine tested 3, ph- 7.5. I will post the other results later.

    I was just thinking that if the supply or return was partly blocked, that it can not be filtering enough and wanted to be sure that the lines were completly open. The problem may very well be in the chimistry only.
    Esther Williams 18'x33'x50" oval above ground
    Filter/pump being changed at this time
    Pentair model 320 auto chlorine feeder
    Taylor TF-100 test kit

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    Join Date
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    Memphis Tn
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    Re: Check for restrictions

    CYA reads 60.
    Esther Williams 18'x33'x50" oval above ground
    Filter/pump being changed at this time
    Pentair model 320 auto chlorine feeder
    Taylor TF-100 test kit

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    mcoonan's Avatar
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    Re: Check for restrictions

    I would think that you have 2 different issues going on.
    1st is that your pool sounds like it has an algae problem. Read here: pool-school/defeating_algae and here: pool-school/shocking_your_pool.
    2nd is a possible flow issue. Make sure all your valves are open fully. Check your filter to make sure that it is not plugged. You might want to check your impeller for damage. Maybe measure the voltage to your pump motor. Is your pump close to your pool (hoses) or do you have underground pipe?
    Intex Ultra 18' x 52" AG 6,981 Gal.
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    May 2012
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    Memphis Tn
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    Re: Check for restrictions

    The pump is about 12 feet from the pool and the 1-1/2" PVC runs undergorund.

    I know that there is an algae problem, hence the new test kit that just arrived and checking for restrictions.

    Checking the flow is why I started this thread. I am trying to figure out how to be POSTIVE that there is no restriction in the lines, without cutting them out and or replacing them. I would like to know that sediment didn't settle in the lines or that a stick hasn't gotten lodged in and maybe a few leaves stuck or maybe even on of the kids toys, preventing 100% of my flow. If I can't get 100% flow it will be harder, if not impossable, to rid the algae problem.

    It has been raining today and I want to have the wife with me, when I use the new test, so that she and I can get familiar it.

    I've read the links that you referred. It's hard to understand a pool and it's maintance, without first reading and understang POOL SCHOOL. It's good stuff.
    Esther Williams 18'x33'x50" oval above ground
    Filter/pump being changed at this time
    Pentair model 320 auto chlorine feeder
    Taylor TF-100 test kit

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