Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: One skimmer working, the other isn't

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    One skimmer working, the other isn't

    Yesterday, both skimmers were working normally. Today, only one is working. If I plug the working one, then the other suctions - but not both of them at the same time. Any suggestions?
    Thank you!
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,943

    Re: One skimmer working, the other isn't

    Welcome to TFP! So, were the baskets for both skimmers in-place the whole time? No chance that anything might have gotten sucked-up into the one skimmer semi-plugging it up in the pipe perhaps? Have you vacuumed lately? Just some thoughts.
    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
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    Re: One skimmer working, the other isn't

    The baskets were in place. The only thing that is different is that BOTH skimmers were working but I had a leak at the top of the filter. I turned everything off, fixed the leak, turned it all back on - and the skimmer farthest from the pump does not work - unless I plug up the first skimmer box. They will not work at the same time.
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

  4. Back To Top    #4


    Join Date
    Sep 2014
    Location
    Bakersfield, CA
    Posts
    155

    Re: One skimmer working, the other isn't

    Likely something has caused your pump flowrate to drop so there is not enough flow to pull from both skimmers.

    What is the filter pressure now vs previous? Does your filter need cleaning?
    Cheers, Peter
    20,000 gal, 52'x17' kidney shaped IG, Pebble Tec, IntelliPro P6E6VS4H-209L pump. Intellichlor IC40 SWG.
    300 sf Sta-Rite System 3 cartridge filter. Poolvergnuegen 4-wheel suction pool cleaner. TF-100 test kit.

  5. Back To Top    #5

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    Re: One skimmer working, the other isn't

    I did a very thorough cleaning of the filter and it seemed like I was getting somewhere. I noticed that the pump was filling up with more water like it used to. But then, after a short while, I can see water flowing into the pump, but it is not full.

    (My pressure gauge is not working and I will replace it soon).

    I don't no where I could possibly have an air leak. There is absolutely no water leaking anywhere from my plumbing.
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

  6. Back To Top    #6
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: One skimmer working, the other isn't

    Quote Originally Posted by CMA View Post
    I did a very thorough cleaning of the filter and it seemed like I was getting somewhere. I noticed that the pump was filling up with more water like it used to. But then, after a short while, I can see water flowing into the pump, but it is not full.

    (My pressure gauge is not working and I will replace it soon).

    I don't no where I could possibly have an air leak. There is absolutely no water leaking anywhere from my plumbing.
    Most likely culprit is the gasket under the pump strainer lid.

    Stop and think. Or even try this at home. You are the pump. Put a straw in a cup of soda and start sucking. The straw is full. So is your mouth. All the air is gone. Next, poke a small hole in the straw above the level of the cup and try again. What happens? You suck a lot of air with the soda. You don't get a full mouthful.

    That's what an air leak does. That pump basket should be full of water with maybe a small bubble trapped at the top. If it's not, air is getting in. And you don't see it leaking water even with the pump off because it's easier to drain down the pipe back to the pool.

    More info: Pool School - Suction Side Air Leaks
    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!

  7. Back To Top    #7

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    Re: One skimmer working, the other isn't

    Richard - that is absolutely perfect logic. I will replace that gasket asap. In the meantime, is it possible to damage the pump with that much air in it, even though there is water going through? I think that gasket is probably the only thing I have not replaced in my entire system.

    The home we purchased last summer was a repo. We had estimates of upwards to $10K to repair the pool. We have been doing it all ourselves. Last summer, we were replacing 4 inches of water EVERY SINGLE DAY. We just finished replacing the liner last week. Everything is great, except this low suction issue.

    Thanks for your help.
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: One skimmer working, the other isn't

    Check the pump drain plugs, too. It's all covered in that pool school article.
    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!

  9. Back To Top    #9

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    Re: One skimmer working, the other isn't

    In case anyone is reading this and wants to know the resolution....I definitely had air leak(s) in several locations on the suction side. I had to do some re-plumbing to fix one of them, then I found another leak on the pump itself. Since our home was a repo, a lot of our pool problems were created because the bank did not have someone come in and properly close the pool for winter. I could actually hear the crack in the side of the pump housing. I used marine grade cement (JB Weld) and filled and patched the crack. It is holding nicely. Additionally, the drain plug did not have an O ring, so I added that. I took the lid off, cleaned the O ring real well, then lubed it back up and put it on. The system is working better than ever. I still have a small leak somewhere - assuming the suction side because the filter is not totally full of water - but at least both skimmers are working now and we are vacuuming the pool better than we ever have.
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

  10. Back To Top    #10
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,943

    Re: One skimmer working, the other isn't

    Good ole JB Weld. I can't count how many things I have held together by that stuff - mostly under the hood of my car.
    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
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  11. Back To Top    #11

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    Re: One skimmer working, the other isn't

    Hey Richard - I have my suction side issues resolved - thanks to your advice. I have some air still coming out of the returns. I have a few drips on some lines coming out of the pump and going into the filter. Is just a few drips enough to get air in the return lines?
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

  12. Back To Top    #12
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: One skimmer working, the other isn't

    Quote Originally Posted by CMA View Post
    Hey Richard - I have my suction side issues resolved - thanks to your advice. I have some air still coming out of the returns. I have a few drips on some lines coming out of the pump and going into the filter. Is just a few drips enough to get air in the return lines?
    No. After the pump is the pressure side. Water leaks out, air won't leak in.
    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

    Join Date
    Jun 2015
    Location
    Monett, Missouri
    Posts
    7

    Re: One skimmer working, the other isn't

    Ok. I had a feeling that's the answer I was going to get. So, I still have a suction side leak somewhere. I'll keep trying to locate it. Thanks for your responses, they have been very helpful.
    20 x 40 Inground; 2 Skimmer boxes; 5 return lines; no main drain; Pentair pump/filter

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •