Hayward Northstar Pump, Strainer Cover O-ring, SPX4000S
SPX4000S Hayward Northstar Strainer Cover O-ring, After 2008. Round black o-ring measures 8.25in. For Northstar pumps made 2003-2007, a 7-3/4in T-ring was used, see part number SPX4000TS. For Northstar pumps prior to 2003, see part number CX400G, a Factory Blue color o-ring, with a 7-3/8in diameter. See all Hayward Northstar parts in our Pump parts department.