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Thread: Pressure gauge goes up and down...

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    gamerasian's Avatar
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    Pressure gauge goes up and down...

    Just when we had started enjoying the new pool(2days) I see that the returns are not working continuous.. The water in the pump basket goes up and starts but then again half of the water is drained out. When this happens the filter pressure gauge goes down to 0.. And the returns stop pumping out water. But in approx 5 mins this motor baskets fills up and the returns pumps out a lot..

    Is this normal ? If not kindly help with the reasons and possible solutions..

    thanks in advance...
    24k IG vinyl , new (not any more)pool, new ( not any more) water Hayward super pump and sand filter.

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    Mod Squad jblizzle's Avatar
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    Re: Pressure gauge goes up and down...

    The pump should stay completely full of water at all times. Check that your water level is high enough in the skimmer and that the skimmer weir is not getting suck.
    Jason, TFP Moderator
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    gamerasian's Avatar
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    Re: Pressure gauge goes up and down...

    Quote Originally Posted by jblizzle View Post
    The pump should stay completely full of water at all times. Check that your water level is high enough in the skimmer and that the skimmer weir is not getting suck.
    That raises another question... The water level is going down ard1.5" in 1 week.. This happened few weeks back when our motor was not working.. The crew came back (who fixed the pool )and closed one of the returns near the steps and said things shod be fine.. Now that motor works and kid r swimming and it's been extremely hot in 90degree last week.. Made me think it's because of the heat evaporation and kids playing ..jump etc.. Do u think this is something to worry about ?I read somewhere on Internet that about quater inch of evaporates per day on a hot day..

    The water is now just bat the skimmer lower frame..
    24k IG vinyl , new (not any more)pool, new ( not any more) water Hayward super pump and sand filter.

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    Mod Squad jblizzle's Avatar
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    Re: Pressure gauge goes up and down...

    Quote Originally Posted by gamerasian View Post
    The water is now just bat the skimmer lower frame..
    And that is why your pump is losing water. You have to keep the water at the middle of the skimmer.
    Jason, TFP Moderator
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    Thimble's Avatar
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    Re: Pressure gauge goes up and down...

    Raise your water level to about half way up your skimmer opening, keep it there and I'll bet your problem goes away. Sounds like your skimmer doesn't have enough water to keep it filled and your pump is sucking it dry.

    Those skimmers are hungry and you have to keep them fed.
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    Re: Pressure gauge goes up and down...

    You will burn the pump up if you kerp dry running it. They are expensive!
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    Mod Squad pooldv's Avatar
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    Re: Pressure gauge goes up and down...

    If you have a main drain switch the suction to the drain or part drain part skimmer so it won't run dry.
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    Richard320's Avatar
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    Re: Pressure gauge goes up and down...

    It's called surging.

    You suck the water out of the skimmer and lose prime. The basket goes empty, the pump stops pumping, and the pressure goes down. Then the water flows in enough, the pump primes and starts pumping, then it sucks the skimmer dry again and the whole cycle repeats. Its easy to fix. Just add water. And make sure the skimmer flapper isn't sticking on a twig or something because that will do it too.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    gamerasian's Avatar
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    Re: Pressure gauge goes up and down...

    Quote Originally Posted by Griswald View Post
    You will burn the pump up if you kerp dry running it. They are expensive!
    i know just bot one

    - - - Updated - - -

    Quote Originally Posted by pooldv View Post
    If you have a main drain switch the suction to the drain or part drain part skimmer so it won't run dry.
    I always to in half drain n half skimmer..
    my doubt about evaporating is it valid?

    - - - Updated - - -

    Quote Originally Posted by Richard320 View Post
    It's called surging.

    You suck the water out of the skimmer and lose prime. The basket goes empty, the pump stops pumping, and the pressure goes down. Then the water flows in enough, the pump primes and starts pumping, then it sucks the skimmer dry again and the whole cycle repeats. Its easy to fix. Just add water. And make sure the skimmer flapper isn't sticking on a twig or something because that will do it too.
    I had just filled it up...do u think there is some leak in any pipe? Or it is just evaporation.. In this rate if water level goes down I will have to fill every 5 days..
    24k IG vinyl , new (not any more)pool, new ( not any more) water Hayward super pump and sand filter.

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    Richard320's Avatar
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    Re: Pressure gauge goes up and down...

    Quote Originally Posted by gamerasian View Post
    i know just bot one

    - - - Updated - - -


    I always to in half drain n half skimmer..
    my doubt about evaporating is it valid?

    - - - Updated - - -


    I had just filled it up...do u think there is some leak in any pipe? Or it is just evaporation.. In this rate if water level goes down I will have to fill every 5 days..
    If it's been windy, 1.5" per week is reasonable.

    A bucket test is the surefire way to tell. Directions are in Pool School - Leak Detection
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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