A swimming pool gasket is a piece of rubber that is used to prevent leaks in a swimming pool. These gaskets can be used for pumps and other pieces that go inside of swimming pools, explains INYOPools.com
There are actually many kinds of gaskets that are used on a number of swimming pool parts, such as the pool pump and pool skimmer. They are commonly used with seals to prevent leaks from occurring and to repair existing leaks. Gaskets are used in both in-ground and above-ground swimming pools, and their uses are similar to gaskets found in other everyday applications.