Hayward AIR RELIEF ASSY W/ O-RING

The Hayward Air Relief Assembly with O‑Ring is a small but important component used on certain Hayward filter systems to manually release trapped air from the tank, helping restore proper internal pressure and ensuring efficient water circulation. The assembly typically includes a threaded relief valve paired with a sealing O‑ring, allowing it to open smoothly when venting air and close securely to prevent leaks once the system is fully primed. Its durable, chemical‑resistant construction allows it to withstand repeated use, pressure fluctuations, and long‑term exposure to treated water and outdoor conditions. Because it is a compact valve‑and‑seal combination, the estimated weight generally falls in the range of 0.05 to 0.1 pounds.