Hayward SPX4000UNPAK1 2-Inch Union Connector Replacement Kit for Select Hayward Northstar, Ecostar and Tristar Pump Union connector replacement kit Fits hayward northstar sp4000 pump series models sp4005(ns), sp4007(ns), sp4010(ns), sp4015(ns), sp4020(ns), sp4030(ns) Also fits hayward northstar sp4000 pump series models sp4005(ns), sp4007(ns), sp4010(ns), sp4015(ns), sp4020(ns), sp4030(ns) Also compatible with Hayward EcoStar and TriStar pump series models SP3400VSPVR, SP3400VSP, SP36075EE, SP3250EE Includes 1 each union nut, connector and gasket