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Thread: Calculate Pool Gallons

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    Calculate Pool Gallons

    I'm not exactly sure how many gallons are in my pool. I keep seeing different amounts from different places. My pool is 27' round 48" deep. I've seen some that say 15,054, 15,500, 16,500, 17,200 etc. I found a calculator that says to multiply 27 x 27 x 4 x 5.9 to get my answer. Can anyone help me out so I know how many gallons of water I'm treating. Thanks a ton.
    30k gal IG Pebble Sheen, Jandy Cartridge Filter CV460 150gpm, 650sf Heliocol Solar, Jandy 1.5HP Variable Filter Pump,
    Jandy 1.5HP Spa Booster Pump, Jandy 1.5HP Water Feature Pump (waterfall, wf bypass, deck jets, shelf bubblers)

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Calculate Pool Gallons

    Use at the bottom.

    Usually the water level is 6" lower than the wall height ... so use 3.5' as the depth (or actually measure it). That gives 15000 gallons.
    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
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    Join Date
    Jul 2012
    Lotus, California

    Re: Calculate Pool Gallons

    Graphic example... remember to balance units.

    ~ 8,400 gallon, cartridge, IG, fiberglass, 1hp & 120 gpm filter design, ~ 2002

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