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Thread: Filter pump has gotten very loud and flow is slowing

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    Filter pump has gotten very loud and flow is slowing

    I have a spillover spa that slowed to barely a trickle yesterday and my Polaris 360 wouldn't move at all. I took apart the Pentair filter and cleaned all 4 cartridges today and the flow greatly increased but my Polaris still isn't working correctly.

    During the summer, the Polaris had good flow, worked great, and the spillover was very active. Now, the Polaris is giving me a lot of problems and the spillover has slowed. Tonight it's about half of what it usually is (and I just cleaned the filter cartridges!).

    There is a diverting valve that can direct additional water to the Polaris 360 and if I turn that Jandy valve to send more water to the Polaris the loud whining lessens and the Polaris starts working. But then the spillover is a trickle.

    What is going on here? Is my pump dying? Are the cartridges bad?
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Mod Squad JohnT's Avatar
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    Re: Filter pump has gotten very loud and flow is slowing

    What does your pressure gauge read?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Filter pump has gotten very loud and flow is slowing

    Only 2. The waterflow and the Polaris 360 are both going right now... but I still don't think the right amount of water is flowing.

    P.S. It's a 2hp single speed pump.
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Re: Filter pump has gotten very loud and flow is slowing

    If your psi is 2 and you have a functioning gauge, then you have a blockage on the suction side of the pump.

    Somewhere between the skimmers and the pump, something is restricting the flow. Could be a valve in the wrong position or it could be something that got sucked into the skimmer.

    Does your gauge drop to zero when you turn off the pump? You normal psi should be probably somewhere around 10-18 (although it could be more or less) but 2 is not adequate.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Filter pump has gotten very loud and flow is slowing

    Yes it drops to zero. The gauge is new and working correctly.

    I currently have it set to draw from both skimmers and 2 floor suctions. If one or more of them is clogged would the loud noise be the pump straining to pull additional water from the other lines?
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Re: Filter pump has gotten very loud and flow is slowing

    Restricting the flow of the intake to the pump doesn't really cause it to "strain" exactly, but it is not very good for it and it would certainly have an effect on the pump noise.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Richard320's Avatar
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    Re: Filter pump has gotten very loud and flow is slowing

    What do you see in the strainer? I'm betting lots of air and churning.

    The mechanic's rule of thumb is the last thing you worked on is the first thing that breaks. Have you opened the strainer recently? It might not be sealed right. Did you vacuum right before this started? There's probably a wad of leaves caught in an elbow somewhere.

    After you double check the valve positions, open the strainer and try backflushing the suction lines with a garden hose. A drain king would be best, but sealing it up with a rag may also help you build enough pressure. As long as you're in the strainer, reach up with your fingers and see if the impeller is full of soggy leaves or something. Kill the pump with the circuit breaker - don't trust the timer!
    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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    Filter pump has gotten very loud and flow is slowing

    I just had to clean the impeller of our intelliflo pump a few weeks ago for exactly the same problem. Some grass clippings and other fine material had made it thru the skimmer basket and into the impeller, clogging it up.

    Took all of forty five minutes to get it done, and this was my first time to disassemble a pump. Found a video on YouTube that gave a good overview of the process and the tools needed. Good luck!
    15260 gal IG plaster pool
    Swimquip HRS16-01 Sand Filter (20-28 gpm)

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    Re: Filter pump has gotten very loud and flow is slowing

    I've removed the strainer basket a few times and that's not it. I reached into the impeller and there's debris in there that is going to have to come out. Feels like quit a bit. I am going to check Youtube today to see how to open up that pump.

    Thanks for all your help, I'll keep updating as I continue my adventure.

    -Tom
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Re: Filter pump has gotten very loud and flow is slowing

    9/16"ths socket/ Six bolts from the seal plate (holds the motor) from the front half. Split the two to expose the impeller and diffuser. Re-assembly is in reverse order. Might take 15 minutes.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

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    Re: Filter pump has gotten very loud and flow is slowing

    Took apart the motor and found no debris inside. The pool's flow is now so bad that it's turning a cloudy green/blue and there's nothing I can do about it. I called the home warranty guys out today because after I put the pump back together it's barely flowing at all.

    The home warranty will fix pump problems but not clogs or leaks. The company to check for leaks is coming out this week and so is the one to check for clogs.
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Re: Filter pump has gotten very loud and flow is slowing

    It really doesn't sound like a pump problem. It sounds as though you have a suction side blockage. The pump is trying to do its job but some obstruction is impeding flow to the pump.

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    Re: Filter pump has gotten very loud and flow is slowing

    Yeah there has to be something blocking the skimmers or main drain. I haven't had any luck unblocking it myself though.
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Re: Filter pump has gotten very loud and flow is slowing

    Quote Originally Posted by twoolley
    Yeah there has to be something blocking the skimmers or main drain. I haven't had any luck unblocking it myself though.
    If you have a home warranty, that would be a good thing to use it for.

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    Re: Filter pump has gotten very loud and flow is slowing

    Quote Originally Posted by twoolley
    The pool's flow is now so bad that it's turning a cloudy green/blue and there's nothing I can do about it.
    That is due to lack of chlorine and you can add liquid chlorine manually.

    Have you tried to back flush the suction line? Put a hose into the suction line that comes into the pump basket. Wrap it with a rag to seal and turn on the water. See if anything comes out of the skimmer.
    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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