Perma Cast 1-1/2" MPT Brass Hydrostatic Relief Valve (PV-15) filburmfg and this Balboa Spa Light

and this Balboa Spa Light Assembly is designed for compatible applications where the original lighting has failed or become less dependable

The Waterway 400-9120 cartridge mounting assembly is designed for compatible filter applications using a 1-1/2 inch NPT connection

ID approximately 5-3/8 x 5 inches

and SP1077 style skimmers

Perma Cast 1-1/2" MPT Brass Hydrostatic Relief Valve (PV-15) filburmfg and this Balboa Spa LightA hydrostatic relief valve helps protect a compatible structure by relieving pressure under the intended conditions, and this Perma Cast version features a 1 1 2 inch MPT brass construction using the PV 15 reference. Hydrostatic relief valves are useful because underground or surrounding pressure conditions can create serious stress if they are not properly managed. This valve has practical value because the brass construction and threaded 1 1 2 inch