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Thread: Decreased flow

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    Decreased flow

    First time opening our pool. Pool company closed it last fall. I removed the return plugs, the bottle that was screwed into the skimmer, plug in pump basket. Replaced both drain plugs in the pump, 1 in the filter, and 1 in the heater. I opened the skimmer line. I primed the pump and I do get water flowing into the pump basket. I would estimate that it is filling up about 1/2 way and with good flow. I have 4 returns and the first 3 have water coming out but at a reduced rate. Last return has no water coming out of it. I am getting small bubbles out of the first 3. The main drain has been plugged for at least 8 years. At the skimmer, I do not feel any suction when I place my hand in the bottom of the skimmer. I ran the pump for a total of 10 min today and then stopped. Do I need to run the pump longer to get the air out and all returns working or is this an indication of a problem?

    Thanks


    Update 6/4/15.................,,,,,,,,,
    Pool company installed a pentair variable speed pump last night. It took a few minutes and tightening a couple of unions to get a full basket of water with pump running. Pump speed and jets were adjusted and everything looked great. I went back out after 40 min and noticed the pump basket had 3/4 water in it and my pressure gauge (which is new) was bouncing back and forth from 10 - 0. The level in basket is filling and flushing. I still feel no,suction when I put my hand in the skimmer. I replaced 1 o-ring in 1 union bc I had an extra. Seems I back to square one with a new pump.
    Last edited by dlg007s; 06-04-2015 at 06:17 AM. Reason: Update
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Mod Squad jblizzle's Avatar
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    Re: Decreased flow

    Welcome to TFP!!!

    You should not run more than a couple minutes for the pump to fully prime.
    Sounds like something is still blocked.
    Post up pictures of the equipment setup.
    Jason, TFP Moderator
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    Re: Decreased flow

    photo 1
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Mod Squad jblizzle's Avatar
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    Re: Decreased flow

    You sure you have the correct suction valve open? Why not open both?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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  5. Back To Top    #5

    Re: Decreased flow

    The valve on the right is from the skimmer. The closed valve on the left is from the main drain. It doesn't open.
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Re: Decreased flow

    anyone have any ideas? Would I be correct to assume that the issue is most likely on the suction side? leak, clogged skimmer line? Or am I missing an important pool opening step?
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Richard320's Avatar
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    Re: Decreased flow

    Low pressure and low flow indicate a restriction on the suction side.
    High pressure and low flow indicate a restriction on the pressure side.
    Where's the pressure in relation to last year?

    Air in the pump basket generally indicates a suction side problem. I'd doublecheck all those plugs you reinstalled as well as the pump strainer basket lid gasket. While it's off for inspection, stuff the garden hose into the pump inlet and seal it up with a rag and turn it on. See if you have a lot of flow coming up in the skimmer.
    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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    Re: Decreased flow

    I went to the pool store and got a new lid gasket and a new pressure gauge. Installed them and flipped the switch.....now the pump is not starting up. just gives a low humming noise. Thoughts? Will begin my online search.
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Richard320's Avatar
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    Re: Decreased flow

    Quote Originally Posted by dlg007s View Post
    I went to the pool store and got a new lid gasket and a new pressure gauge. Installed them and flipped the switch.....now the pump is not starting up. just gives a low humming noise. Thoughts? Will begin my online search.
    Any chance a wad of leaves or pine needles got sucked in and through the basket? They'd plug u the impeller and give the symptoms you described.

    Or the motor could be dead.
    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!

  10. Back To Top    #10

    Re: Decreased flow

    I dont feel any clumps. Its only had a few dead worms in it after start up. I can spin the blades with a screw driver. After checking it, I turned it back on and it hummed for about 5 seconds and then shut off. Now it doesnt make any noise. Not sure if it would overheat so fast or not.
    It is a jacuzzi model 1MF-S. order number 94026110. Dated 19Jan01.

    Internet search shows this to be a 1 HP. Recommendations for a replacement? Saving money on the electric bill would be nice. Again I am running a pentair ic40 system with it.

    Just checked and it will hum again..motor end is warm to touch
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

  11. Back To Top    #11

    Re: Decreased flow

    See update in first post
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Richard320's Avatar
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    Re: Decreased flow

    Quote Originally Posted by dlg007s View Post
    See update in first post
    Update 6/4/15.................,,,,,,,,,
    Pool company installed a pentair variable speed pump last night. It took a few minutes and tightening a couple of unions to get a full basket of water with pump running. Pump speed and jets were adjusted and everything looked great. I went back out after 40 min and noticed the pump basket had 3/4 water in it and my pressure gauge (which is new) was bouncing back and forth from 10 - 0. The level in basket is filling and flushing. I still feel no,suction when I put my hand in the skimmer. I replaced 1 o-ring in 1 union bc I had an extra. Seems I back to square one with a new pump.
    Surging like you describe is most usually a stuck weir flapper or low water. The pump catches prime, it sucks the skimmer dry, loses prime, skimmer refills. Repeat.
    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!

  13. Back To Top    #13
    Mod Squad jblizzle's Avatar
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    Re: Decreased flow

    Please do not update the first post. Makes it more difficult to follow.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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  14. Back To Top    #14

    Re: Decreased flow

    We don't have a flapper. Plenty of water in the skimmer and it's at normal height. Pool company recommended having it pressure tested. 1/2 of the above ground piping was replaced yesterday on the install. I'm going to replace the orings in the unions and see. I did try to run a hose from the pump back up to the skimmer. Didn't notice any change in the skimmer. It does sit below the pool tho. Other suggestions?
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

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    Mod Squad jblizzle's Avatar
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    Re: Decreased flow

    Would be nice if you could try the floor drains instead of the skimmer ... help ID the problem.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  16. Back To Top    #16

    Re: Decreased flow

    Pump has been up and running since Wednesday morning. The suction issues were fixed by replacing the valves.

    The pool got away from me Monday and Tuesday and turned into a green mess by Wednesday morning. I bought the TF – 100 kit this year and have been slamming since Wednesday afternoon. Water looks much better but it is still cloudy in the deep end. Hopefully I will be able to stop after Sunday.

    In the past I have not tested cya. When I tested earlier this week it was zero. The pool calculator estimates 117 ounces to bring me up to 40. I do run a SWG. Should I put 7 pounds of stabilizer in a sock all at once or gradually add it in the pool? Is there a grocery store option for the stabilizer or do I have to actually make a trip to the pool store?
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

  17. Back To Top    #17
    Richard320's Avatar
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    Re: Decreased flow

    Quote Originally Posted by dlg007s View Post
    Pump has been up and running since Wednesday morning. The suction issues were fixed by replacing the valves.

    The pool got away from me Monday and Tuesday and turned into a green mess by Wednesday morning. I bought the TF – 100 kit this year and have been slamming since Wednesday afternoon. Water looks much better but it is still cloudy in the deep end. Hopefully I will be able to stop after Sunday.

    In the past I have not tested cya. When I tested earlier this week it was zero. The pool calculator estimates 117 ounces to bring me up to 40. I do run a SWG. Should I put 7 pounds of stabilizer in a sock all at once or gradually add it in the pool? Is there a grocery store option for the stabilizer or do I have to actually make a trip to the pool store?
    You should target 30 CYA now and then use 12 FC as your shock level. When the SLAM is done, you can raise it further.

    Where to buy chemicals and how to add them is covered in Pool School - Recommended Pool Chemicals You can find CYA at Walmart, Lowes, Ace hardware, etc.
    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!

  18. Back To Top    #18

    Re: Decreased flow

    Water looked little better this morning. I am currently running the pump 24/7 at 2700 rpm at 13 psi. The old pump was a 1 HP at 19 psi. Should I increase the rpm to help clear the water faster? If so what should I bump it to?
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

  19. Back To Top    #19

    Re: Decreased flow

    Last week


    6 days later
    22,000 gal- inground liner- pentair ic40 saltwater generator - pentair superflo 1.5 HP VS
    St. Louis, MO

  20. Back To Top    #20
    Texas Splash's Avatar
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    Re: Decreased flow

    Great progress. Wow. Interesting thread. Wonderful work.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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