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Thread: Plumbing Pressure Test Question - Pool Under Construction

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    CincyRed's Avatar
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    Plumbing Pressure Test Question - Pool Under Construction

    On Thursday, the plumbing was pressured up because of an inspection.
    It was pressured up Thursday afternoon in the heat, I have taken the readings every morning.

    Thursday - 45 lbs. (afternoon)
    Friday - 40 lbs.
    Saturday - 36 lbs.
    Sunday - 34 lbs.
    Monday - 34 lbs.
    Tuesday - 33.5 lbs.

    I called the PB with the concern of the falling pressures, but they said that is normal, the pressure will fall.
    Is this true? Should the pressure continually fall?
    Now it seems to be leveling out.
    Is this normal?

    Can someone help with my concerns, pavers are due tomorrow.

    Thanks.
    15,000 gallon in ground free form pool (500 sq ft) with waterfall, 4x160 Intelliflo Pump, IntelliChlor IC40,
    Rheem Heat Pump with cooling, Cartridge Filter, Quartz WhiteGem Finish, Auto leveler, Pavers.
    My Pool Build

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    Mod Squad Bama Rambler's Avatar
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    Re: Plumbing Pressure Test Question - Pool Under Constructio

    Are all those readings about the same time of day?
    The first day doesn't bother me but to keep dropping does.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    CincyRed's Avatar
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    Re: Plumbing Pressure Test Question - Pool Under Constructio

    Quote Originally Posted by Bama Rambler
    Are all those readings about the same time of day?
    The first day doesn't bother me but to keep dropping does.
    Except for Thursday, when it was pressurized in the afternoon, all of the readings were taken in the morning.
    15,000 gallon in ground free form pool (500 sq ft) with waterfall, 4x160 Intelliflo Pump, IntelliChlor IC40,
    Rheem Heat Pump with cooling, Cartridge Filter, Quartz WhiteGem Finish, Auto leveler, Pavers.
    My Pool Build

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    JasonLion's Avatar
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    Re: Plumbing Pressure Test Question - Pool Under Constructio

    Do you know if it was pressurized with water or with air? The pressure varies a lot more when pressurized with air.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    CincyRed's Avatar
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    Re: Plumbing Pressure Test Question - Pool Under Constructio

    Quote Originally Posted by JasonLion
    Do you know if it was pressurized with water or with air? The pressure varies a lot more when pressurized with air.
    Water, but there has to be air in there also, as there is no way to purge the air.
    15,000 gallon in ground free form pool (500 sq ft) with waterfall, 4x160 Intelliflo Pump, IntelliChlor IC40,
    Rheem Heat Pump with cooling, Cartridge Filter, Quartz WhiteGem Finish, Auto leveler, Pavers.
    My Pool Build

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    JasonLion's Avatar
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    Re: Plumbing Pressure Test Question - Pool Under Constructio

    As long as most of the pipes are full of water the readings should be more stable than that.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    CincyRed's Avatar
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    Re: Plumbing Pressure Test Question - Pool Under Constructio

    So, I let most of the pressure out of the pipe trying to get all of the air out. I then refilled with the water hose, even making sure that the air from the hose was purged, and got it back up to 40 lbs., it has now held steady for 2 hours.
    15,000 gallon in ground free form pool (500 sq ft) with waterfall, 4x160 Intelliflo Pump, IntelliChlor IC40,
    Rheem Heat Pump with cooling, Cartridge Filter, Quartz WhiteGem Finish, Auto leveler, Pavers.
    My Pool Build

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