Hayward C3020/C3025/DE3620 Tank Lid w/Clamp Ring (DEX3620BTC) onoffvalves and this generic wide-mouth version

and this generic wide-mouth version is designed for SP1085 related applications using the G-157 reference

When the correct tool is available

Threaded air switches are useful when the application benefits from a more secure mounting style than a simple slip-fit arrangement

Helps preserve one-way flow on the return line

Hayward C3020/C3025/DE3620 Tank Lid w/Clamp Ring (DEX3620BTC) onoffvalves and this generic wide-mouth versionThe Hayward tank lid with clamp ring is designed for compatible C3020, C3025, and DE3620 filter applications where the upper tank closure needs replacement. A lid with clamp ring is useful because it helps secure and seal the filter tank while still allowing access for internal service and maintenance. This replacement is especially useful when the original lid or clamp ring is cracked, leaking, damaged, or no longer securing correctly. Replacing both