Fleck Piston Seal 2900 and 3150 Valves
Replacement tank O-ring for Fleck 5600 & 9000 softener & filter valves, Replacement part for leaks that form where the control valve seals against the tank, The O-ring (Fleck part# 12281) can become brittle, nicked or cut and allow leaks, Genuine Fleck part