Pentair Rainbow Automatic Feeder 320 Spa Chamber (R172037) transformers Adapter pieces like this are

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

The Hayward bottom-mount pressure gauge is designed for compatible filter and circulation applications where water pressure needs to be monitored

Helps collect debris at the skimmer before it reaches the system

Supports proper internal filter assembly

Pentair Rainbow Automatic Feeder 320 Spa Chamber (R172037) transformers Adapter pieces like this areReliable 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