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Thread: pipe size question

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    Join Date
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    pipe size question

    i got a new pool built this summer. all pipes are 2" around equipment/returns except for one 2 ft section between the salt cell and valve actuator which is a flex 1.5" pipe (was put in as a temporary measure but now thinking of leaving it in place). is this going to be an issue longer term as the amount of flow/pressure in this section would clearly be intense to sustain 80 gpm flows (or am i ok to keep this configuration?) pool builder is willing to guarantee the work but just want to make sure im not setting myself up for issues down the road.

    the pool functions properly though, all the returns/water features work even with this 1.5" piece in the loop even on full pump speed.

    thx
    Ontario, Canada
    25K gallons, 425 sqft cartridge filter, IG vinyl, Hayward EcoStar pump

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    Mod Squad jblizzle's Avatar
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    Re: pipe size question

    A short section of smaller pipe will have very little impact on the total flow rate ... although not sure why you think 80 GPM is required At best I get about 45 GPM I think.

    The only time you want higher flow rates would be for a spa or solar heating. For filtration, lower flow rates are better ... and cheaper because it uses much less power.
    Jason, TFP Moderator
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    Re: pipe size question

    higher flow rates when i run 3 sheer descents (3 ft each)... otherwise doesnt work. usually have the pump running at 1700 rpm though, avging around 40 gpm as yours.
    Ontario, Canada
    25K gallons, 425 sqft cartridge filter, IG vinyl, Hayward EcoStar pump

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    Mod Squad jblizzle's Avatar
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    Re: pipe size question

    Got ya. When I run on low speed, which is any time the solar is not running, I am down around 20GPM.

    You could certainly slow yours down more for higher savings ... assuming the skimming is still adequate.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: pipe size question

    Quote Originally Posted by jblizzle View Post
    Got ya. When I run on low speed, which is any time the solar is not running, I am down around 20GPM.

    You could certainly slow yours down more for higher savings ... assuming the skimming is still adequate.
    unfortunately for my setup the salt cell and heater requires at least 30-35gpm to operate... i find for my system the lowest RPMs that works out to is around 1600, any lower and no heat/salt cell.
    Ontario, Canada
    25K gallons, 425 sqft cartridge filter, IG vinyl, Hayward EcoStar pump

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