The Pentair Rainbow 320 is a top-loading, in-line chemical feeder for automatic chlorine or bromine dispensing in pools and spas. Designed to be plumbed directly into the return line, downstream of the pump, filter, and heater, the 320 is suitable for both new installs and retrofits.

This feeder accepts either 1" or 3" slow-dissolving tablets and offers two feed modes—bottom feed for slow erosion or top feed for higher erosion rates. The external control valve allows precise adjustment to suit pool volume and sanitation needs.

Made from durable PVC with a sealed chamber to prevent fume escape, it includes a check valve to protect upstream equipment from chlorinated water backflow.

Specs:

• Tablet Capacity: 98 x 1" or 11 x 3" (up to 4.8 lbs)

• Max Erosion (24 hrs): 0.67 lbs (bottom) / 1.75 lbs (top)

• Treats up to 70,000 gallons/day at 2.5 ppm (top feed)

• Dimensions: 17¾"H x 5"W x 10"D (requires 19" clearance)