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Thread: How much Evaportation is normal in Houston Texas

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    How much Evaportation is normal in Houston Texas

    How much evaporation should you have in inched in a pool on a hot day say 93 degrees. My pool is 11 x 28 foot and we seem to loose on a sunny day 1/2 inch per hot day. My builder says it is evaporating I am going to try the bucket test tomorrow. But I was wondering how much is normal?
    i'VE FALLEN IN AND i DON'T WANT TO GET OUT.

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    tagprod's Avatar
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    seems like a lot. Does it get full sun all day. A half inch to an inch seems right for me for a week. It's rained so much I haven't had to worry about adding much water this summer.
    Brian
    20K IG Gunite w/ raised 7ft spillover spa. 1.5 HP Hayward Northstar pump 425 sq ft Hayward cartridge filter, Colorlogic lights AquaRite SWG AquaLogic PS-8 control
    1hp pump for sheer descent

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    wardsntx's Avatar
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    my buddy looses 1 inch every two days out in Katy. His auto fill is broken and he is having to hose fill it.
    Jay
    36' x19' Freeform, 16' waterfall w/ groto and slide, 5' x 10' sundeck, 12" raised spa. Pentair IntelliTouch, Pentair IntelliFlo 4 x 160, Master Temp 400, IntelliChlor Chlorine generator, Aqua Blue PebbleSheen

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    if you have a new pool, i hear its recommended to leave your autofil off for a few weeks to make sure you don't have any leaks (otherwise, you may very well not know you have one...)

    and its not unusual for a new pool to have a leak or two..

    an inch a day seems pretty high...

    i'm in south louisiana, and i haven't measured but i'd guess about 1/4" a day of evaporation...
    18,000 gallon gunite free form, with spa, 4x160, EasyTouch, SWCG, Pentair cartr filter, Colorlogic lights.

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    My pool loses about 1-1.5 inches a week in Sunny Miami. My neighbors pool is smaller (17x34) and he seems to lose a little bit more per week than my pool. This Summer the rain has averaged about 1 inch per week so I've only had to add water twice this whole Summer.
    20x40 24,000 gal IG plaster/CircuPool RJ45 SWG/2 skimmer/2sp 2.5hp Jandy Stealth/340sq ft cart filter/600sqftHeliocol Solar Panels/6ft semi circlr tanning ledge/25ft deep end bench/5ft sheer descent/2 lion head water features/1300sqft travertine paver/2 Colorlogic lights/Hayward Navigator/3step 2ft raised bond beam

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    This link can help you calculate an annual evaporation rate -- and you can figure most of this is during the summer in most locations. I forget who first directed me to this link, but whomever it was -- thank you...it's a great site for calculating evaporation. [EDIT] Now I remember -- it's Mark (mas985) -- who first referred to that site on The Pool Forum. Thanks again. [END-EDIT]
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    mas985's Avatar
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    Your welcome.

    I found that for at least my pool, summer was double the average daily rate. For my area, 60 inches per year of evaporation (.164"/day) and I measured in the heat of the summer I was losing 3/8" per day or about twice the daily average.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner

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    wow...

    according to that calculator, my 18,000 gallon pool will evaporate about 24,000 gallons in a year.

    makes sense... at about 1/4" a day... but never thougth about losing all of my water in a year...

    interesting indeed....

    not to mention the varying rates at relatively close geographies...
    18,000 gallon gunite free form, with spa, 4x160, EasyTouch, SWCG, Pentair cartr filter, Colorlogic lights.

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    Yes it gets full sun for about 6 hours
    i'VE FALLEN IN AND i DON'T WANT TO GET OUT.

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    Well believe it or not the bucket lost 5/8 of an inch. Could the Polaris 280 account for the rest, its tail seems to come out quite about and spray water out of the pool?
    i'VE FALLEN IN AND i DON'T WANT TO GET OUT.

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    I found this device and ordered it. I am thinking this will help me determine if I have a leak or not as the bucket test was inconclusive.

    Leak Detection device.

    http://www.leaktools.com/mm5/merchant.m ... _Code=FIND
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    What did you find with this device?
    I am in Birmingham AL and I am loosing about a 1/2 inch a day now. It has been so dry here and no rain, but this seems a lot to me so i am trying the bucket method. Just hope the neighborhood cats don't drink too much!!
    35000 in ground vinyl liner with cartridge filter
    Birmingham,AL

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    I just got it today. I plan on setting it up this Thursday. I will let you know what i find. I am anxious to find out what is oging on. I hope it is evaporation.
    i'VE FALLEN IN AND i DON'T WANT TO GET OUT.

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    Wow! That is a lot of water going to make new clouds. I guess it's another reason for a solar cover. Does anyone use a solar cover in the south year around?
    20k Gunite/Prism Blue-Pebblesheen, Pentair Tagelus TA-100D Sand Filter, Heliocol Solar Water Heater, 2 bubblers and 2 waterfalls installed 2007, 3hp IntelliFlo VS Pump 011018 installed 2013, Aquabot Turbo T4 RC and Stenner 45MHP10 w/The Liquidator container installed 2012.
    Antigua Spa by Artesian Spas: 325 gl, 52 jets, 6 hp 2 sp & 6 hp 1 sp, Circulation System 24 Hour Whisper Pure, Ozonator, LED digital lighting, The Artesian Pillowfall installed 2007.
    Retired: 2hp Pentair Whisperflow, Legend Platinum w/booster pump, PH Adjuster

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