U178-920P Pool Pump Drain Plug O-Ring for Sta-Rite JW Series O-39 Description: Drain plug O-ring for Sta-Rite JW series pool pumps Inside Diameter: 1/2" Outside Diameter: 11/16" Cross Section: 3/32" Cross Reference: O-39, 51003100, 017437, 27515-154-350, 308-1009, 308-1001, 12690-09, 31-0943-03-R, 47-0112-00-R, 31-1609-06-R, 1137, R0446000, R0552000, 205-104, 201-010, 273011, 2112, 6020006, P-40, E-45, P-88, 29-113, 07-4021, P-62112/07-2555, 201010, 2923541220, O-2024, U9-359, U9-147, 25010-0200, 30-828-756, 28-828-675, 30-828-750, 805-0112B, 303-0174, R0537000