Pentair O-ring for Drain Plug

The Pentair O-Ring for Drain Plug (part number 192324 or 35505-1424 depending on the specific filter or pump model) is a compact but essential elastomeric sealing component engineered for a wide array of Pentair pool and spa filtration systems, chemical feeders, and centrifugal pumps, including the Clean & Clear cartridge filters and WhisperFlo pump lines. Molded from a premium, high-density synthetic nitrile (Buna-N) rubber, this small circular gasket is designed to stretch and seat precisely within the machined collar groove of the plastic drain plug assembly at the base of the equipment chassis. Its primary structural role is to establish an absolute watertight compression boundary when the plug is threaded hand-tight into the lower drain spigot, effectively stopping slow weeping and preventing high-pressure leaks when the tank or pump housing is operating under continuous hydraulic pressures up to 50 PSI. Engineered to resist distortion from constant compression, this heavy-duty washer easily withstands prolonged outdoor weathering, seasonal temperature shifts, and prolonged contact with harsh sanitizing chemistry such as chlorine, bromine, and acid washes. Because it features a streamlined, low-profile rubber architecture, this individual drain plug O-ring is exceptionally lightweight, carrying a nominal product and shipping weight of approximately 0.01 pounds (about 0.16 ounces).