Why are there two holes at the bottom of a pool skimmer was one of the earliest questions I had when I first got my inground pool and started to clean it.Where there are more than one skimmer in a pool, the second usually has one blanked off with a screw-in blanking plate as only one equalizer is required per pool.What is the purpose of the two holes in a pool skimmer? By used I mean that the valve or valves controlling the flow water from the skimmers to the pump should be open.Depending on how strong the suction you have then you may also have the valve to the main drain at the bottom of the pool open, at least part way.For the second hole at the bottom of a pool skimmer to come into play then the water level must drop below the level of the skimmer.I have had hot tubs for many years and a pool for the last 7 years. Skimmers with a second hole help keep the pump from running dry if the water level is unstable. The first hole in the skimmer leads to the swimming pool pump.

This pipe goes down approximately two feet and through the concrete wall of the pool.

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Skimmers with a second hole help keep the pump from running dry if the water level is unstable.The first hole in the skimmer leads to the swimming pool pump. I had to learn how to clean it, maintain it and fix it the hard way. Do not use a skimmer that is broken; replace either the broken parts or the whole apparatus.How to Clean the Carburetor on a 6.5 Toro Lawn MowerHow to Install a Hayward Side Wall Skimmer in an Above-Ground Pool Copyright Leaf Group Ltd. // Leaf Group Lifestyle. First Hole.

Since then I have helped many friends and neighbors with their pools and now I want to share everything I have learned with you.I have had hot tubs for many years and a pool for the last 7 years. It prevents the pump from taking in air if the pool's water level dips below the skimmer opening.

These cookies will be stored in your browser only with your consent. Have a look at your pump with the vacuum hose plugged in. Well one hole at the bottom of the pool skimmer takes water to the pool filter, via the pool pump, to allow it to be cleaned and then returned to the pool by the return line/s.The second hole, called an equalizer, connects to either the drain inlet at the bottom of the pool or to a separate inlet a few feet below the surface of the water in the side of the pool.If the water level in the pool falls below the water entrance at the top of the skimmer, so no more water is running in over the weir door, then water will start to be drawn from the pool via the second hole.If this didn’t happen then the pump would continue to operate but would start to run dry. Many pools may be designed to use these (which is why there are two holes) but over time people either don’t put them back in after cleaning or they break (or perhaps don’t even know what they are).A float valve assembly, also known as an equalizer assembly, sits over the the 2 holes at the bottom of the skimmer and effectively does very little until either the pool level drops to below the skimmer or if the skimmer basket becomes so full that no water can be drawn though it (so no water goes to the pump.When either of these two things happen the float in the valve is sucked down forming a seal and then causes water to be drawn from the pool drain pipe, preventing the pump from running dry.If you do not have one I suggest you buy one to fit your particular skimmer.

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