Complete with a 3 - way latching solenoid, a D/P switch, a programmed PC, a 9 volt battery, the GB5-B controller combines many convenient features into a compact integral unit. The filters can be cleaned in 2 different modes: D/P and manual.

GB6 and GB7 controllers are complete with a solenoid, a differential pressure sensor, a backwash counter, and an emergency alarm output. GB6 controllers backwash a single filter, while GB7 controllers control up to two filters simultaneously. The filters can be cleaned in 3 different modes: D/P, timer, and manual. They are available in 115/230 volts or are battery operated, 9V/12V.