Earth Science Laboratories: Earthtec 
Algaecide

Robo Control: Automated Chlorine Valve Control (SCADA)

Sherwood: Chlorine Valves and Accessories

US Filter/Wallace & Tiernan: Gas Feeding Equipment, Metering Pumps, Control & Analyzing Equipment.

US Filter/Stranco: LMI Metering Pumps, Controls, and Accessories