There's no need to second guess your pool skimmer when you rely on the strength, durability and versatility delivered by the Hayward 1.5-inch in-ground pool Skim Master. This uniquely designed pool skimmer is specifically created for concrete pools and features a non-corrosive unibody construction. It includes an adjustable deck collar and access cover while the optional float bypass valve offers a suction outlet through the skimmer system. It also boasts an automatic bypass for low water. No glue is used to manufacture this long-lasting skimmer, which includes a self-adjusting 80-inch weir loaded with a stainless steel spring.