Hayward's automatic skimmers have been an industry standard for more than 30 years. Now the Dyna-Skim skimmers have been redesigned to match the needs of today’s above ground pools, while remaining applicable for use on existing in-ground pool models. By utilizing the skimmer basket instead of the pump strainer basket, the need to turn the pump on and off has been eliminated. Simply attach the appropriate Skim Vac to the vacuum hose, locate over the skimmer basket and begin vacuuming.