The skimmer is composed of a weir, a cap and a collection basket. Water enters the skimmer through the weir, which is a flap referred to as a bumping pad. The bumping pad allows water and debris to flow into the skimmer then traps the debris so it doesn’t go back into the pool. A collection basket is inside the skimmer that collects dirt and debris from the pool. The collection basket can be removed and cleaned out by opening the skimmer’s cap.
In-ground pool skimmers come in several sizes. The skimmer is typically constructed of concrete or vinyl. In general, skimmers are between 10 and 11 inches in width from the weir to the end of the skimmer and about 12 inches long vertically. Skimmers usually have two 1 1/2- or 2-inch female iron pipe fittings that connect to the skimmer’s equalizer and drain pump.
All of the pool’s suction outlets must comply with the Virginia Graeme Baker Pool and Spa Safety Act. This includes the skimmer because it’s part of the pool’s suction system. This federal law generally applies to public pools and new residential pool construction. The law enforces safety requirements to avoid potential entrapment hazards because of a pool’s suction system.
Check the skimmer’s equalizer cover. The pool’s covers, including the main drain and equalizer covers, must meet the American National Standards Institute’s code A112.19.8 in accordance with federal regulations administered in 2009. Manufacturers that make pool equipment and parts must comply with these federal regulations. The equalizer cover is labeled with a “VGB” marking. If the skimmer's equalizer cover was manufactured before 2009, it should be replaced.