This TruSeal serviceable check valve for pool services has a clear lid and a bright seal flapper for easy inspection and access. Features swing design to be used for both return and intake water. CPVC hi-temp plastic bodies which feature deeper sockets than others for better glue joints. Seal flapper is made of hi-tech thermoplastic polymer seal. Corrosion proof pin and stainless steel spring. Reversible flow. Measures 2-inch or 2-1/2-inch spring straight body.