Pentair PacFab Challenger/Waterfall Black Trap Lid (354112) relayscontactors A standpipe assembly is useful

A standpipe assembly is useful because it helps maintain the proper internal flow path and supports the arrangement of key media-handling components inside the filter

or connection performance

The 18 inch by 19-1/4 inch dimensions

or worn plug can cause unwanted leaks

Pentair PacFab Challenger/Waterfall Black Trap Lid (354112) relayscontactors A standpipe assembly is usefulThis black trap lid is a replacement cover for compatible PacFab Challenger and Waterfall pump trap assemblies. It is used when the original lid is cracked, weathered, stripped, or no longer sealing reliably over the strainer basket. A sound trap lid is essential for maintaining pump prime and preventing air from entering the suction side of the system. Black trap lid for compatible Challenger and Waterfall pumps Helps seal the pump strainer area