Raypak Standpipe Assy [Protege RPSF28] (018221F) marquisspas The cross-reference numbers give this

The cross-reference numbers give this cartridge practical value because filter replacement is most reliable when matched directly to recognized cartridge identifiers

A brush kit is useful because it provides flexibility across different surfaces and shapes

Includes connector for intended installation support

and this Flo Control union is designed with 2 inch slip or 2-1/2 inch spigot options on both ends using the 1600-20 reference

Raypak Standpipe Assy [Protege RPSF28] (018221F) marquisspas The cross-reference numbers give thisThe Raypak Standpipe Assy [Protege RPSF28] is a replacement standpipe assembly for compatible Raypak Protege RPSF28 sand filter systems. The standpipe is an important internal filter component that works with the lateral assembly to move water through the filter tank and return clean, filtered water back to the pool or spa system. This part is commonly replaced during sand filter rebuilds, internal repairs, or service work where the original standpipe