Pentair Diverter Valve Shaft O-ring

The Pentair Diverter Valve Shaft O-ring (part number 270110 or 270110Z) is a precision-molded elastomeric sealing component engineered specifically for the internal rotor shaft of Pentair 2-way and 3-way pool and spa diverter valves, as well as select automated valve actuators. Molded from a premium, high-density 70 Durometer synthetic nitrile (Buna-N) rubber, this small circular gasket conforms to standard AS568 dash-number 114 dimensions, featuring an inner diameter of approximately 5/8 of an inch and a cross-sectional thickness of 3/32 of an inch. Its primary structural role is to seat tightly within the machined perimeter grooves of the vertical diverter handle shaft, establishing an absolute watertight and airtight compression boundary that isolates the active pool water flow from the external handle assembly. This specialized seal ensures that the valve body can safely manage high-velocity directional flow adjustments and sustain continuous hydraulic operating pressures up to 50 PSI without weeping, leaking down the stem, or drawing air into the pump's filtration loop. Engineered to maintain its elastic shape memory under constant rotational friction and mechanical twisting, it completely resists degradation from intense outdoor UV exposure, seasonal temperature shifts, and prolonged submersion in harsh pool chemicals like chlorine, bromine, and salt-chlorine generator outputs. Due to its miniature, low-profile elastomer ring architecture, this individual diverter shaft O-ring is exceptionally lightweight, carrying a nominal product and shipping weight of approximately 0.01 pounds (about 0.16 ounces).