Pentair Rainbow Automatic Feeder 320 Spa Chamber (R172037) transformers and this Filbur FC-0486 cartridge

and this Filbur FC-0486 cartridge is designed for C-7439 and C-7624 applications

This Pentair/Sta-Rite replacement is built for sand filter repair and helps restore even sand-bed distribution inside a Cristal-Flo T-300BP-2 filter

or remote communication issues

or no longer seating properly in the strainer housing

Adapter pieces like this are useful when the reel structure depends on a specific insert-style connection to maintain proper fit

Pentair Rainbow Automatic Feeder 320 Spa Chamber (R172037) transformers and this Filbur FC-0486 cartridgeReliable pool equipment depends on small parts staying sealed, aligned, and secure. The Rainbow Automatic Feeder 320 Spa Chamber is a Pentair Rainbow replacement for chemical feeder service, helping helps maintain controlled sanitizer delivery. In feeder service, correctly matched small parts help manage sanitizer flow, reduce nuisance leaks, and keep maintenance more predictable. Matches compatible equipment applications that reference part number