Pentair Brominator (Model 300)

The Pentair Rainbow Model 300 is a heavy-duty, offline automatic chemical feeder designed to provide high-capacity sanitization for large residential or commercial swimming pools and spas. Constructed from durable, corrosion-resistant materials, this unit is installed adjacent to the main filtration system and utilizes a pressure differential to divert water through the chemical chamber, efficiently eroding bromine tablets before returning the treated water to the pool. The feeder weighs approximately 8 pounds when empty and features an 11-pound chemical capacity, managed by a top-mounted control valve that allows for precise adjustment of the bromine output. Its "Easy-Lock" threaded lid ensures a secure, airtight seal, making it a reliable solution for maintaining consistent water chemistry without the need for manual dosing.