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Thread: Reduced pressure and air bubble in bottom basket

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    Join Date
    May 2014
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    Beebe, Arkansas
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    Reduced pressure and air bubble in bottom basket

    My pump is a swimpro sw256t sand filter. When I try to backwash, the pressure is really low. When I rinse, the sight bulb has an air bubble in it. And there is very little suction at the skimmer. Yesterday I put a valve in the line that goes from the skimmer to the bottom basket. It was working ok right after that. I was able to vacuum. Now, there isn't enough pull at the skimmer to vacuum. Any ideas?
    I have a 33' ag pool with a swimpro sw256t sand filter.

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    Re: Reduced pressure and air bubble in bottom basket

    If the pool is full of gunk, the filter could just be clogged up, indicating it's working. What does the presssure gauge tell you?
    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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    May 2014
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    Beebe, Arkansas
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    Re: Reduced pressure and air bubble in bottom basket

    I don't really know. I inherited the pool when I bought the house last fall. I don't think the pressure gauge is working. Even if it does, the glass is so fogged I can't tell if it is. Also, I installed a valve yesterday. I went out this morning, unhooked the line from the skimmer to the bottom basket and checked the valve to make sure it was working properly. When I put it back on I tightened the clamp tighter than what it was. Then when I turned the pump on, there wasn't any air in the bottom basket. So I turned the lever to backwash to see if I had pressure there. As soon as I turned on the pump, air was back in the bottom basket. What is this I'm hearing about using shave cream to detect air leaks? Do I use the foam type or the gel type? I'm gathering I can put it all around the joints?
    I have a 33' ag pool with a swimpro sw256t sand filter.

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    Re: Reduced pressure and air bubble in bottom basket

    Quote Originally Posted by akd72012 View Post
    I don't really know. I inherited the pool when I bought the house last fall. I don't think the pressure gauge is working. Even if it does, the glass is so fogged I can't tell if it is. Also, I installed a valve yesterday. I went out this morning, unhooked the line from the skimmer to the bottom basket and checked the valve to make sure it was working properly. When I put it back on I tightened the clamp tighter than what it was. Then when I turned the pump on, there wasn't any air in the bottom basket. So I turned the lever to backwash to see if I had pressure there. As soon as I turned on the pump, air was back in the bottom basket. What is this I'm hearing about using shave cream to detect air leaks? Do I use the foam type or the gel type? I'm gathering I can put it all around the joints?
    You have water in the hose from skimmer to the pump, yes? The pump basket is full of water, yes? You turn the pump on and it starts sucking air? Sounds to me like the water level is to low in the skimmer and the pump just sucked it dry.

    And this is the end of my troubleshooting ability without knowing what your normal filter pressure is and what it is now.
    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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    Join Date
    May 2014
    Location
    Beebe, Arkansas
    Posts
    5

    Re: Reduced pressure and air bubble in bottom basket

    Can you suggest what type gauge I need to get? Also, the water level in my pool is almost to the top of the opening to the skimmer.
    I have a 33' ag pool with a swimpro sw256t sand filter.

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