Hayward SX180HG Drain Cap and Gasket Replacement for Select Hayward Sand Filter Fits SwimPro SW-196T, SW-236T, SW-256T SERIES Fits Pro Series S166T, S180TC, 210TC, 220TC, 244T2, 244TC, S270T (before 2005) Fits Pro Series S360T2, S270T2, S310T2 SAND FILTER SERIES (before 2005)