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Thread: Does One Inch Water Loss Per Day = Leak?

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    TortugaCat's Avatar
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    Does One Inch Water Loss Per Day = Leak?

    We are currently losing one inch of water per day. Our pool heater has been off since the night of September 23 and water temperature has been low 60's / high 50's. We have not used the pool or spa since then, but both are currently open. Last week was rainy, cold and humid with highs at the beginning of the week in the mid to upper 60's and lowered into the 50's as the week progressed.

    The spa has a spillover into the pool that runs for four hours per day: 12PM-2PM and 10PM-12AM.

    There is a solar cover on the spa, but nothing on the pool.

    I used an online calculator that told me that one inch of water loss for our pool (40x16) was about 400 gallons. This seems to me like way more than water would occur with evaporation. But our PB is saying he thinks it is normal and not a leak.

    In doing research (and pardon my ignorance) it seems that seeing bubbles can be an indication of a leak. When at least one of our in-floor cleaning heads comes on there are bubbles that come out - sort of like it's spitting. Could this be relevant?

    I will try the bucket test tonight, but I would appreciate any other insight or suggestions that you might have about this problem.

    Thanks!
    Pool + Spa in MA -- 40' x 16' gunite pool, 8' x 8' spa with spillover. PebbleSheen Ocean Blue. Vibrance Glass Nero 2" x 2" tile. SWG, Paramount in-floor cleaning system, 400 BTU Sta-Rite LP Gas Heater, ACT1500 Heat Pump, S7M120 Sta-Rite Modular Media Filter, IntelliPro XF 3.0 HP Pump, SuperMAX VS 2.2 HP Pump, AquaLink automation. LP gas firepit. 1700 sf stamped concrete patio.

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    Mod Squad kimkats's Avatar
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    Re: Does One Inch Water Loss Per Day = Leak?

    Funny you should ask that as I have noticed I have been losing quite a bit of water as of late. I am in Florida so we are still hot but...........

    I wonder if the wind has anything to do with it?
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    TortugaCat's Avatar
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    Re: Does One Inch Water Loss Per Day = Leak?

    Quote Originally Posted by kimkats View Post
    I wonder if the wind has anything to do with it?
    I wondered that too, but last week was icky New England fall weather - we were socked in with low clouds, mist and rain.
    Pool + Spa in MA -- 40' x 16' gunite pool, 8' x 8' spa with spillover. PebbleSheen Ocean Blue. Vibrance Glass Nero 2" x 2" tile. SWG, Paramount in-floor cleaning system, 400 BTU Sta-Rite LP Gas Heater, ACT1500 Heat Pump, S7M120 Sta-Rite Modular Media Filter, IntelliPro XF 3.0 HP Pump, SuperMAX VS 2.2 HP Pump, AquaLink automation. LP gas firepit. 1700 sf stamped concrete patio.

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    Re: Does One Inch Water Loss Per Day = Leak?

    We are currently losing one inch of water per day.
    That is a leak....no doubt.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    TortugaCat's Avatar
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    Re: Does One Inch Water Loss Per Day = Leak?

    Quote Originally Posted by duraleigh View Post
    That is a leak....no doubt.
    Thanks duraleigh. I appreciate your response. They are coming tomorrow morning to check it out.
    Pool + Spa in MA -- 40' x 16' gunite pool, 8' x 8' spa with spillover. PebbleSheen Ocean Blue. Vibrance Glass Nero 2" x 2" tile. SWG, Paramount in-floor cleaning system, 400 BTU Sta-Rite LP Gas Heater, ACT1500 Heat Pump, S7M120 Sta-Rite Modular Media Filter, IntelliPro XF 3.0 HP Pump, SuperMAX VS 2.2 HP Pump, AquaLink automation. LP gas firepit. 1700 sf stamped concrete patio.

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    Mod Squad pooldv's Avatar
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    Re: Does One Inch Water Loss Per Day = Leak?

    Agreed, 1/8"-1/4" per day is normal evaporation.
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    TortugaCat's Avatar
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    Re: Does One Inch Water Loss Per Day = Leak?

    Bucket test results after 12 hours point to it being a leak. Water in pool lower than water in bucket. Waiting for PB to arrive.

    Edited to add that the water level in the pool is 1/4 inch lower than that in the bucket.


    Pool + Spa in MA -- 40' x 16' gunite pool, 8' x 8' spa with spillover. PebbleSheen Ocean Blue. Vibrance Glass Nero 2" x 2" tile. SWG, Paramount in-floor cleaning system, 400 BTU Sta-Rite LP Gas Heater, ACT1500 Heat Pump, S7M120 Sta-Rite Modular Media Filter, IntelliPro XF 3.0 HP Pump, SuperMAX VS 2.2 HP Pump, AquaLink automation. LP gas firepit. 1700 sf stamped concrete patio.

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    TortugaCat's Avatar
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    Re: Does One Inch Water Loss Per Day = Leak?

    There was a small leak somewhere around the salt generator which they fixed. They did a dye test around the lights and skimmer and found nothing. They think the water loss is a mix of evaporation, the spillway, and the small leak.
    Pool + Spa in MA -- 40' x 16' gunite pool, 8' x 8' spa with spillover. PebbleSheen Ocean Blue. Vibrance Glass Nero 2" x 2" tile. SWG, Paramount in-floor cleaning system, 400 BTU Sta-Rite LP Gas Heater, ACT1500 Heat Pump, S7M120 Sta-Rite Modular Media Filter, IntelliPro XF 3.0 HP Pump, SuperMAX VS 2.2 HP Pump, AquaLink automation. LP gas firepit. 1700 sf stamped concrete patio.

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