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Thread: What is acceptable level of evaporation?

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    Join Date
    Nov 2015
    Location
    Oxford CT
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    45

    What is acceptable level of evaporation?

    how much water should I loose per day (or week) in North East before thinking about dreaded leaks?

    I'm in CT. Today is 75 F, Humidity is 44%, windy, 9 mph
    Inground vinyl liner 20 by 40 pool in North East
    Hayward 1,5 HP super flow pump
    Sand Filter

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    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
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    30,085

    Re: What is acceptable level of evaporation?

    1/4 "/24 h is normal. much above that. suspect a leak
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    JoyfulNoise's Avatar
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    May 2015
    Location
    Tucson, AZ
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    11,625

    Re: What is acceptable level of evaporation?

    There is no set answer as evaporation varies A LOT by region and by prevailing weather conditions. If you want to check for a leak, we suggest you perform the standard Bucket Test (see here - Pool School - Leak Detection) to rule out the effects of evaporation.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    mas985's Avatar
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    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: What is acceptable level of evaporation?

    What is your water temperature? Is your pool heated?

    My heat transfer model predicts an average water temp of 74F without heat and evaporation of .21"/day. But that increases with higher water temps.
    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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