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Thread: 14" Sand Pump not working right

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    14" Sand Pump not working right

    We purchased the 14" Intex sand pump and Intex wall skimmer this year to go on our 22' round metal set Intex pool. We also have the Intex SWG that we have used for several years and love it! When we first set up the pump at the beginning of the year, it was pulling water through the skimmer great and the output was strong. It really kept our pool extremely clean (compared to the paper cartridges) and was hardly needing to vacuum at all. In recent weeks, (especially this weekend), we've noticed that the pull of the pump is extremely low as well as the output which of course causes the SWG to give the Low Flow warning and shut down. We have checked all the connections and hoses (which are all Intex hoses and brand new this year) and are not showing any air leaks. We've backwashed several times and rinsed as well. Not really sure what the problem is...any help would be appreciated.
    22X56 Intex Deluxe Easy Set Round
    14" Intex Sand filter
    Intex Saltwater pump

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    mac.dblues's Avatar
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    Re: 14" Sand Pump not working right

    I don't know anything about the SWG, but I just wonder if maybe the problem is in it? It sounds like you have done everything right with the sand filter. Have you opened the SWG up to see if something is stopping it up?
    Mac.Dblues and ProfessorDaisy's Lower Arkansas Pool Install
    Intex UltraFrame 20ft x 52in deep, 9,400 Gallons / Approx 78,500 lbs, Intex 1600 GPH, 14" sand filter, Hayward Dyna-Skim SP1091LX, Taylor K-2006, SpeedStir, Sample Sizer
    First Fill May 2014, Deck finished June 2014, Mods happening probably on a continuous basis. Stay tuned.....

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    mas985's Avatar
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    Re: 14" Sand Pump not working right

    Have you tried backwashing the filter?

    Has the filter pressure changed and from/to what?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: 14" Sand Pump not working right

    I don't know which fittings you have. But on some there is a strainer grid behind the blue hose adapter for the skimmer. You may want to take your skimmer hose off and unscrew the blue adapter and see if its clogged behind there.
    18'X48" Intex Easy Set, 2650 GPH Intex sand filter, Intex SWCG, Intex deluxe skimmer

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    Re: 14" Sand Pump not working right

    We cleaned the SWG this weekend (soaked the plates in vinegar), so I know they are clean and we've not had any trouble with the SWG other than the low flow indicator. The pressure is in the green (low green however). I have been reading several posts on here today and wonder if the pump isn't clogged behind the leaf collection basket? The basket is empty and we've cleaned out the area where the basket sits, however, I wonder if its not clogged behind there in the motor??We had a storm last week while we were on vacation and I'm sure there was probably alot of tree debris that fell and didn't get cleaned out. What should the pressure read by the way?? It doesn't really say in the manual and we've backwashed several times.
    22X56 Intex Deluxe Easy Set Round
    14" Intex Sand filter
    Intex Saltwater pump

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    mas985's Avatar
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    Re: 14" Sand Pump not working right

    What should the pressure read by the way??
    Every pool is different which is why I asked what it read before this happened and what it is reading now. Knowing your normal filter pressure can help diagnose issues like this when they arise.

    But you could very well have a blockage in the impeller inlet or impeller itself. With the basket removed, you can try to reach into the inlet and clear any debris. Sometimes running water backwards through the pump with a hose can clear the debris on its own. Otherwise, you might have to take apart the pump to clear the impeller.

    Also, make sure the suction line/skimmer is clear of debris.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: 14" Sand Pump not working right

    If you have the plunger style valves, you should check behind the blue skimmer hose adapter for a clog.

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    Re: 14" Sand Pump not working right

    didn't get a chance to work on it last night due to storm that came through. I did check the pressure and it was around 5. I know that's too low (that's hardly any pressure!). Plan on trying all your suggestions tonight if Mother Nature allows.

    We do have plunger style valves so we'll check those as well. Thanks for all the suggestions!! Will post results tomorrow.
    22X56 Intex Deluxe Easy Set Round
    14" Intex Sand filter
    Intex Saltwater pump

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    mac.dblues's Avatar
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    Re: 14" Sand Pump not working right

    The higher your pressure reading, the lower your suction should be. 5 is probably close to normal. Mine is usually between 4 and 5 after a good backwashing. When it gets around 6 or 7 flow and therefore suction is significantly reduced. For any vacuum (pool or home) flow is more important than suction. Suction is dead air space, flow moves the trash to the filter.
    Mac.Dblues and ProfessorDaisy's Lower Arkansas Pool Install
    Intex UltraFrame 20ft x 52in deep, 9,400 Gallons / Approx 78,500 lbs, Intex 1600 GPH, 14" sand filter, Hayward Dyna-Skim SP1091LX, Taylor K-2006, SpeedStir, Sample Sizer
    First Fill May 2014, Deck finished June 2014, Mods happening probably on a continuous basis. Stay tuned.....

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    Re: 14" Sand Pump not working right

    so if the pressure reading is where it should be is that indicitive of another problem such as a clog in the valve or impeller? Also, I forgot to mention that I noticed the outlet for the output has lots of air bubbles coming out around the edge of the cover. Is that normal?
    22X56 Intex Deluxe Easy Set Round
    14" Intex Sand filter
    Intex Saltwater pump

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    mac.dblues's Avatar
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    Re: 14" Sand Pump not working right

    The pressure guage is there to let you know when to backwash. It is measuring pressure in the sand filter. I suspect you simply have a blockage somewhere or you have air in the filter still. Ours will sometimes bubble out the return when vacuuming.
    Mac.Dblues and ProfessorDaisy's Lower Arkansas Pool Install
    Intex UltraFrame 20ft x 52in deep, 9,400 Gallons / Approx 78,500 lbs, Intex 1600 GPH, 14" sand filter, Hayward Dyna-Skim SP1091LX, Taylor K-2006, SpeedStir, Sample Sizer
    First Fill May 2014, Deck finished June 2014, Mods happening probably on a continuous basis. Stay tuned.....

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    Re: 14" Sand Pump not working right

    If you have been running your pump all year with plunger valves and the Intex skimmer you will have a clog behind the blue adapter inside the pool on the front of the plunger valve. Unscrew the blue adapter and clean out the debris. You will not have a clogged strainer basket on the pump or a clogged impeller because the debris is clogging behind the blue adapter on the plunger valve strainer grid.

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    Re: 14" Sand Pump not working right

    Yes, but I've unscrewed that many times to connect the vacuum (right?) You are talking about the large intake on the pool where the skimmer is screwed on?
    22X56 Intex Deluxe Easy Set Round
    14" Intex Sand filter
    Intex Saltwater pump

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    Re: 14" Sand Pump not working right

    The part I'm talking about would not typically be removed to vacuum. If you follow the hose from the bottom of your skimmer to the side of the pool, I'm talking about the blue thing the hose is connected to. If that's not the part you're talking about already, then you need to unscrew it and check behind it.

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    Re: 14" Sand Pump not working right

    Impeller not clogged (and husband thrilled at the screws and nuts that had to be removed and replaced) and I've undone the skimmer connection and ran water through the plunger. When I came home today it was not pulling hardly anything through the skimmer but was outputting ok. I'm confused!

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    Re: 14" Sand Pump not working right

    It can't have more coming out than coming in. Is the blue adaper on? Is the hose hooked up? Is the skimmer height set correctly? There are flaps on the bottom of the skimmer that will let the pump get water through the skimmer if it is set wrong or blocked.

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    Re: 14" Sand Pump not working right

    Yes the blue adaptor is on. We've taken the pump apart and cleaned everything. The filter that is attached to the controls was clogged with yuck. Cleaned all of it, reattached everything and it's working!! Hallelujah!!

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    Re: 14" Sand Pump not working right

    So what did you find to be the specific cause of the original flow problem? Then what was the skimmer problem after you fixed the flow?

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    Re: 14" Sand Pump not working right

    Yay! It's awesome that you got it working.

    Quote Originally Posted by Melshy169 View Post
    Yes the blue adaptor is on.
    However, we haven't been asking if it is on. What we are getting at is that there is a grid screen behind it that tends to clog. You should still unscrew it and look behind it for any debris that could still be having a bit of effect.
    Intex UltraFrame 14'x48in - 3,900 gallons. Intex 1600 GPH combo Sand Filter/SWG Hard Plumbed w/Hayward skimmer, suction & return. Borates.
    And... 15k gallon kidney shaped gunite 1975 vintage. Hayward DE3620 filter + Hayward 750 pump.
    TF100 Test Kit | Pool School | Pool Math

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    Re: 14" Sand Pump not working right

    apparently the problem was the filter that is under the controls on the pump was clogged. It was full of all kinds of yuck so we took it off and cleaned it, cleaned all the the outlets, ran water through all the valves and reassembled. I have to admit, I've never had this much trouble with a pump until I added that Intex skimmer...beginning to wonder if that's the root of the trouble, although when it's working, it does get alot of the surface stuff and keeps the pool alot cleaner. After spending the last three days on this forum, I've decided that the Hayward skimmer is the way to go....now just to convince my husband to install it. On the skimmer note, ours does not have a screen behind the blue adaptor, so that wasn't clogged. Thanks for everyones help and suggestions!!
    22X56 Intex Deluxe Easy Set Round
    14" Intex Sand filter
    Intex Saltwater pump

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