Your skimmer is your first line of defense when it comes to filtering out debris in your pool. And that means it’s easy to get a clogged-up skimmer line. So if you’re getting poor suction or you think your pool skimmer line is clogged, there are two ways to unclog your system: 1) Move the pool diverter valve (or Jandy valve) back and forth to open and close the skimmer valve; 2) Clear the blockage with a drain cleaning bladder like a Drain King. Before you troubleshoot, make sure it's indeed a clog in your skimmer line and not an air leak in your pump.
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⏰ Timestamps:
00:00 - Introduction to How To Unclog Your Pool Skimmer Line
00:37 - How Does A Pool Skimmer Work?
01:52 - How Do You Clean A Pool Skimmer?
02:35 - How Do You Know If Your Pool Skimmer Line Is Clogged?
04:08 - How To Unclog Your Pool Skimmer Line With The Diverter Valve
04:40 - How To Unclog Your Pool Skimmer Line With A Drain Cleaning Bladder
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Your skimmer line is the first line of defense when it comes to filtering out debris in your pool, and that means it's easy to get a clogged up, skimmer line. So if you're getting poor suction or you think, your pool skimmer line is clogged. Here's how to troubleshoot and unclog your system, let's dive in real quick before we continue. If you want more help taking care of your pool, be sure to grab our free pool care cheat sheet at swimuniversity.com, cheat sheet, it's totally free and will help you keep your pool, clean and clear all season long.

First, how does a pool, skimmer work pool skimmers act as a gateway to your pool's filtration system? Your pool pump sucks water into the skimmers and, as the water passes through the skimmer basket, the skimmer collects large debris. This stops things like leaves and twigs from getting into your filter, and that means your filter can focus on capturing smaller contaminants. The moving door on the front of the skimmer is called the weir and it opens and closes and regulates the amount of water entering the skimmer. When you turn the pump off the weir closes, so that debris collected in the skimmer basket doesn't float back into your pool.

If you have two holes at the bottom of your skimmer, well, the furthest one from the pool is the suction port that leads the skimmer to the pump. Your pool, skimmer is also used for vacuuming. You can connect a vacuum by inserting the vacuum hose into the skimmer suction port or by using a skimmer vacuum plate. The skimmer basket is also where some people add chlorine tablets.

As the water is pulled through the skimmer. It runs over the tablets and dissolves them, but be careful you don't want to leave any partially dissolved tablets in the pool skimmer when your pump isn't running that highly chlorinated water can end up sitting in one place or the tablet's acidity can damage your equipment. So how do you clean a pool skimmer simply take the cover off the skimmer and pull out the basket and dump it out, then put it back in the skimmer and replace the cover clean out. Your pool skimmer at least once a week, and if you have a smaller pool that you use more often or you're, constantly seeing debris in your basket clean it every other day.

The longer debris sits in the skimmer basket, the more likely it will start to break up and decay. If you want to increase the amount of contaminants picked up by your skimmer, you can cover it with a pool, skimmer, filter, sock or pantyhose. The finely knit fabric will help catch smaller debris. You can also place a few tennis balls in your skimmer basket.

Their fuzzy exteriors will help absorb surface oil. So how do you know if there's a clog in your pool skimmer line? Well, there are a few signs. It might be clogged one, your pool pump is pulsing or unusually loud and the pressure is low if the water is surging or pulsing in your pump. This may be a sign of a clogged pipe, but first you have to rule out other potential problems like air leaks check.
The o-ring on the pump lid then check to see if your impeller inside your pump is clogged be sure the pump is off when you check this, and if you need any help, troubleshooting your pump be sure to check out our other videos. It may also be a time to backwash or clean your filter if you haven't done that in a while. If you've just cleaned your filter, that may have caused an air pocket to form number two, your water intake into your pump is slow, even if the skimmer basket is empty. If your water is slow coming into your pool, pump check the skimmer door to make sure it isn't stuck also make sure your pool's water level is halfway up the skimmer.

If the skimmer door and water level look good, then you may have a clog in your skimmer line to find out which pipe is blocked, run your pool, pump and check each line one at a time. You can do this by using your pool diverter valve aka. A jandy valve switch the valve between the skimmers and the main drain lines. If one line has low pressure or your pump loses suction, that means it's clogged with an air pocket or debris.

As you test these lines be sure to always leave one line open. You never want to run your pump with all the intake valves closed and no water flowing. So if there is something blocking your skimmer line, here's how to unclog it one try moving the pool's diverter valve back and forth opening and closing the pool diverter valve. While the pump is running may dislodge.

Whatever is blocking your skimmer line, shimmy the diverter valve back and forth between the lines for several seconds each time after several rounds of opening and closing the skimmer valve, you may remove the air pocket or dislodge the debris into the pump strainer basket and, like we Said be sure to always leave one line open during this process, so there's water flowing into your pump as it runs number two clear: the blockage with a drain cleaning bladder drain cleaning bladders attach to your garden hose and then are inserted into the clogged line when The hose is turned on the bladder expands and pushes pressurized water down the pipe you can find these bladders in the plumbing section of your local home improvement, store first shut off the pump completely make sure your diverter valve is turned to the skimmer line, then remove Your skimmer basket insert the hose with the bladder attachment into the suction hole of your skimmer and push it in as far as it will go. When you turn on the hose, the bladder will expand, while it's in the pipe that pressurized water will push any debris and air into the pump. Now, if that doesn't work, you can try using the drain. Cleaning bladder in the pump make sure the pump is turned off and the diverter valve is set to the skimmer line, remove the pump basket and insert the hose with the bladder into the pump's intake pipe that flows back towards the pool.
This will force pressurized water back into the skimmer and keep an eye out for debris that blows back into the skimmer. You'll also want to use the bladder in the pump. If you have a clog in your main drain line, just make sure the diverter valve is turned to the main drain. When you do this, if nothing works, it might be time to call a professional to come, unclog your lines, but don't give up right away.

It can take several rounds of diverting water and using the bladder to unclog your lines if you need more help. Maintaining your pool throughout the season grab our free pool care cheat sheet at swimuniversity.com cheat sheet, and if you found this video helpful leave a comment hit. The like button and subscribe for more pool maintenance tutorials throughout the season. That's it thanks again and happy swimming.


7 thoughts on “Pool skimmers 101: how to unclog your pool skimmer line | swim university”
  1. Avataaar/Circle Created with python_avatars Rob Byers says:

    Is it really important to shut off your pump when you change the flow of water out of your pump for example like back washing or filtering? I don't have a shut off switch I guess I just unplug it.

  2. Avataaar/Circle Created with python_avatars Scott S says:

    Had a clog in the skimmer pipe..looked in there saw a leg… turns out it was a gopher.. fun stuff..Pulled it out with needle nose pliers. 🙂 Are you in Ottawa ?

  3. Avataaar/Circle Created with python_avatars Kip McMillan says:

    Love your videos, you've taught me a lot and I appreciate your insights… But I have an interesting question. What if my pressure is so strong that I get swirls sucking air into my pump (coriolis effect)? I routinely use skimmer socks which dissipates it, but do you have any other ideas? 1 skimmer, 1 jet..

  4. Avataaar/Circle Created with python_avatars Matt Seibert says:

    Great Info. THANK YOU !

  5. Avataaar/Circle Created with python_avatars Aaron Sanchez says:

    Very helpful thank you

  6. Avataaar/Circle Created with python_avatars fernando101090 says:

    Good to know.
    Thx for the info!

  7. Avataaar/Circle Created with python_avatars zul issani says:

    while vacuuming the pool can i close the main and use only skimmer side to get more better result.?

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