Chemical Feeders

The Rola‑Chem 550311 Interlock Pressure Switch Kit is designed to safeguard chemical controllers by preventing chemical feed during low-flow or pump-off conditions. It functions as a secondary interlock, cutting power to the controller if return-line pressure is absent—protecting users and equipment.

Factory preset to 3 psi activation, the switch is adjustable within the 1–6 psi range, with a clearly labeled calibration knob. The kit plugs into any standard GFCI outlet (120 VAC) and features a normally open switch rated to 10 A. All components are UL listed, and the kit includes descriptive labels, simple installation instructions, and required tubing and fittings. Compatible with any automated chemical controller system.

Key Features

• Adjustable activation pressure from 1.0 to 6.0 psi (factory set at 3 psi)

• Normally-open switch rated for 120 VAC, 10 A chemical feed control

• Includes complete kit: switch, compact enclosure, tubing, fittings, and user guide

• Simple plug-in installation to a GFCI outlet—no complex wiring needed

• Ideal safety interlock for chemical feed systems using chemical controllers

• UL-listed components for reliability and code compliance

What’s Included

• Interlock Pressure Switch module with calibration knob

• Pre-assembled enclosure box

• 20 ft of ¼″ OD HDPE tubing

• ¼″ Tube × ¼″ NPT pressure fitting

• Descriptive label and user-friendly instructions