Here’s a little trick for all you out there who have a skimmer door (also known as a weir door) that no longer floats. Most of the time the reason that the door no longer floats is that the piece of Styrofoam that acts as a float in the door has worn away and fallen out, normally in small pieces.

First things first, why do you want the weir door to float? As the skimmer sucks water in, the weir door bobs up and down acting as a floating dam, which causes the skimmer to suck only the top layer of water. This is normally where all the debris is in a pool that hasn’t already fallen to the bottom of the pool. If the weir door is not functioning correctly you could be sucking water three or four inches deep instead of around half an inch deep. You will create a lot stronger surface current by limiting the depth of intake water to the skimmer.

The second reason for having a functioning weir door is to keep all the debris in the skimmer when the pool pump turns off. While the pool pump is sucking, the weir door is bobbing up and down just under the surface of the water. When the pool pump turns off the weir door floats to the surface of the water keeping all the debris trapped in the skimmer.

The first thing you are going to want to do is examine the weir door and make sure the plastic is not damaged. If the plastic is damaged you are going to want to replace the whole weir door. If the door is original it will most likely have two screws holding it in place towards the front of the skimmer, and if it is not original the weir door will normally just be held in place by a spring loaded bar (you should just be able to pull the whole weir door right out). If you are replacing the whole weir door, scroll to the bottom of the page and click on the “Valterra Products Inc. Weir Doors” Amazon link. Make sure to measure your door first as there are different sizes. If you cannot find the exact size, buy the one that is smaller and closest in size.

If the weir door appears to be in good shape all we need to do is make a new float for it. The reason I like to fix the original weir door verses just replacing it with an aftermarket one is quality. The original weir door is always of superior quality and is normally affixed to the skimmer with screws. Aftermarket weir doors use thinner plastic and have that spring loaded bar I mentioned above.

Weir Door

The first step in repairing the weir door is to borrow one of your kids’ pool noodles or go buy one. (I do warn you, you will be cutting six inches of the end of the noodle before giving it back to said kid, so if you have a picky kid I recommend buying yourself your own pool noodle and saving yourself the trouble of explaining why you defaced their noodle.) So now that you have a pool noodle in your position go ahead and cut off six inches, now cut that in half length wise. You should have two half cylinders that are six inches long. Cut them in half length wise again, leaving you with four quarter cylinders that are six inches long. You will only be using one of the quarters but I would recommend saving the others as you can expect to need to replace the noodle float every few years.

Weir Door

Now it’s time to install the float. On the underside of the weir door there is a rather large hole; you are going to want to take the noodle piece and push it in to one side. Then bend the noodle and insert the other end of the noodle into the other side of the weir door. If you now let the weir door lay flat and look at the top side, you will see the two ends of the noodle. I always center the noodle just to make sure it is not rubbing the sides of the skimmer, stopping the weir door from floating freely.

Well that’s it! Your weir door should now be working correctly. It probably will have taken you longer to read this post than to actually fix the door.

Amazon has great prices on pool supplies! Below are links to some of the supplies referenced in the article.

Valterra Products Inc. Weir Doors