This set of 2 “O” rings will fit both S and T pumps that have 8 screws connecting the top and bottom together. (Not for the old Ring Clamp pumps which use the 385319039 “O” rings, Set of 3)
Dometic 385310151 Kit O’ring S/T pump
This set of 2 “O” rings will fit both S and T pumps that have 8 screws connecting the top and bottom together.