Hayward STAR-CLEAR PLUS KNOB O-RING

The Hayward Star-Clear Plus Knob O-Ring is a specialized, small-format sealing component designed to prevent water leakage and pressure loss at the point where the locking knob assembly interfaces with the filter head. Manufactured from a durable, chemical-resistant synthetic rubber, this O-ring is engineered to withstand the friction of frequent tightening and loosening while remaining resilient against the harsh effects of chlorine, salt, and UV exposure. Its primary mechanical function is to provide a secondary seal around the threaded tie rod or the knob's internal shaft, ensuring that the pressurized water inside the filter tank cannot migrate upward through the fastening mechanism. By maintaining this airtight barrier, the O-ring helps preserve the system's hydraulic prime and prevents the gradual buildup of mineral deposits or debris within the threads of the locking assembly, which could otherwise lead to seizing or mechanical failure. For shipping and logistical purposes, the estimated weight of the Hayward Star-Clear Plus Knob O-Ring is approximately 0.05 pounds in its retail packaging, while the actual weight of the rubber ring itself is negligible, at roughly 0.02 pounds.