Amazon.com: Swimables DEX2400S Filter Air Gauge Relief and Adapter Assembly Replacement for Hayward DEX2400S - Designed to fit smoothly onto Hayward ProGrid DE Filter - Air Relief Valve for DE Filter :
Pressure Relief Valve | Plumbing
How To: Replace a Hayward DE(Pro Grid) Filter Air Relief Valve - YouTube
Amazon.com: Swimables DEX2400S Filter Air Gauge Relief and Adapter Assembly Replacement for Hayward DEX2400S - Designed to fit smoothly onto Hayward ProGrid DE Filter - Air Relief Valve for DE Filter :