Hayward FILTER HEAD O-RING

the Hayward Filter Head O-Ring is a precision-engineered sealing gasket designed to create a pressurized, watertight barrier between the filter head (or valve) and the main filter tank body. Manufactured from a high-quality, heavy-duty synthetic elastomer—typically nitrile rubber or EPDM—this O-ring is specifically formulated to resist the degrading effects of constant UV exposure, heat, and the harsh chemical environments found in chlorinated and salt-water pools. Its primary mechanical function is to prevent leaks at the main joint of the filtration system, ensuring that the pump maintains its prime and that the internal hydraulic pressure remains consistent for effective filtration. Over time, the O-ring’s elastic properties allow it to compress perfectly into the tank’s seating groove, forming a reliable seal that can withstand the significant expansion and contraction cycles of the tank during pump operation. For shipping and logistical purposes, the estimated weight of a standard Hayward Filter Head O-Ring is approximately 0.3 pounds in its retail packaging, while the actual dry weight of the rubber ring itself is roughly 0.2 pounds.