AIR RELIEF VALVE AND O-RING

This assembly is a critical component for a pool or spa filter system. It’s installed at the top of the filter tank and is designed to safely vent trapped air that accumulates inside the filter housing. By releasing this air, the valve prevents pressure buildup, ensures proper water flow through the filter media, and helps maintain efficient filtration. The included O‑ring ensures a tight, leak‑free seal at the valve interface — essential to prevent water leaks and maintain the integrity of the filter housing under pressure. When functioning properly, this air‑relief valve assembly supports smooth operation, protects internal components from stress due to air lock or overpressure, and contributes to the longevity of the filtration system.