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Thread: Question about In Ground Pump - 3 feet below water line

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    Question about In Ground Pump - 3 feet below water line

    Hi

    New to the forums and have spent a bit of time reading all the useful info – great site!!!

    I bought a house last year and this is the first year of real pool use – used it briefly last year

    My main question is around the circulation/pump/lack of any real activity in the water

    Quick overview

    In ground pool with around 14000 gallons

    Has a Cartridge filter

    Bought a new pump last year as when I opened it last year, the pump sounded like a rocket engine - so clearly needed to be replaced

    I bought a 1HP pump last year and it is here – probably not the best by a long shot;

    http://www.amerimerc.com/inground-po...ny-ig-pump.htm


    Everything seems to circulate well, no apparent leaks, good pressure, etc

    I have taken apart the filter and completely hosed out the cartridges and the housing unit

    This is a Chlorine based pool

    This is an old pool (maybe 20 years old) and has several issues which I am not sure can be easily rectified – here we go;

    My issues are as follows

    In-ground pool (24 x 14 approx.), but pump actually sits around 3 feet below the water line, and maybe 20 feet from the skimmer area, due to how it was built – this would be impossible to change unless I re-plumbed everything (which would involve heavy digging and basically ripping up a lot of the yard)

    Lack of any real movement in the pool water – almost stagnant

    Only 1 skimmer and 1 return eyeball

    Dual main drains

    Suction on the skimmer is negligible and as I say, very, very little movement in the pool water, which gives me issues

    This also has a solar system, with the panels on the roof of the house - so I guess, further pressure on the pump?

    IS THERE ANYTHING YOU GUYS WOULD SUGGEST THAT I COULD DO OR EASILY CHANGE TO IMPROVE THIS?

    Should I consider a more powerful pump or even say a 1.5hp above ground pump (since my pump is actually sitting 3 feet below water levels)

    I think the issues is 2 fold – only 1 eyeball and the 1HP In Ground Pump being about 3 feet below the water line and having to push everything back up the hill – cant be easy

    Any suggestions please?

    Thanks

    Paul

  2. Back To Top    #2
    mas985's Avatar
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    Re: Question about In Ground Pump - 3 feet below water line

    Are there no valves on the suction/return side of the pump? There should be so the pump can be isolated. Otherwise, you can never empty the pump basket.

    Your current pump should be more than big enough for your pool. Mine is only a 1/2 HP.

    What is the filter pressure? Have you cleaned it recently?

    Also, a pump below water level is no different than one above water level when comes to performance. The head curve does not change.
    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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    Richard320's Avatar
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    Re: Question about In Ground Pump - 3 feet below water line

    If you want to improve skimmer action, close off the main drain.

    If it doesn't have a separate valve, it's probably plumbed into the skimmer. And if so, you need a diverter in the skimmer. Looks like a flying saucer, usually. That type works like this:
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Question about In Ground Pump - 3 feet below water line

    Thanks for the input guys

    Yep - have cleaned out the filter, hosed all down as well as cleaning inside the unit itself - off just now but think it was around 15psi

    There are certainly valves for the "main drain" and for the skimmer - both are fully open and appear to be functioning

    Shown here - both CLOSED right now - main drain on left and skimmer on right

    IMG_0309.jpg


    Here is another picture

    IMG_0311.jpg


    The 2 vertical pipes go to the solar heating system

    In terms of closing off the main drain valve - i take that is only on a temporary basis and needs to be left open in the main?

    And sorry, I dont really understand the little graphic above regarding the float

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    mas985's Avatar
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    Re: Question about In Ground Pump - 3 feet below water line

    It might be useful to get a picture with all the valves in the correct position because on the bottom picture, the two red handled solar valves are off while the actuated 3-way solar valve is directing flow to the panels so that is a dead head situation.
    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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    Richard320's Avatar
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    Re: Question about In Ground Pump - 3 feet below water line

    I leave my main drain open a slight amount, just to avoid temperature stratification. If I'm brushing, it's wide open and the skimmer is off to hopefully pull any dust in before it can resettle. When vacuuming. main drain is closed, unless the pump is pulling so hard the vacuum sticks. Then it gets cracked enough to free the vacuum.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Question about In Ground Pump - 3 feet below water line

    the two red handled solar valves are off while the actuated 3-way solar valve is directing flow to the panels so that is a dead head situation.
    When the solar valves are OPEN, the black handled valve (3 way solar valve?) turns 180 degrees to face the other direction

    Is that not correct?

    I will also try closing the main drain valve a little to see what difference that makes

    If I'm brushing, it's wide open and the skimmer is off to hopefully pull any dust in before it can resettle
    Never knew about that either - thanks

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    mas985's Avatar
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    Re: Question about In Ground Pump - 3 feet below water line

    The off position of a three way valve is opposite of the handle direction. So in the picture above, water is routed to the right (direction of the handle) instead of to left which is the bypass position. I think you have the water flow basically shut off. What is the 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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