Pentair CS400™ Commercial Backwash Semi-Auto Controller for '02 Tank System

The Pentair Stark™ CS400™ Commercial Semi-Automatic Backwash Controller for a 2-Tank System (Model CS400-02) is an advanced, programmable automation hub meticulously engineered to optimize the sequential backwashing of dual-vessel commercial sand filtration configurations. Designed for public swimming pools, community aquatic centers, and high-demand water features utilizing Stark™ or THS Series® horizontal sand filters, this sophisticated control unit bridges the gap between labor-intensive manual cleaning and fully automated systems. Powered by integrated Acu-Trol® intelligence, the CS400 allows an operator to safely initiate a flawless, multi-stage backwash cycle at the single touch of a button. Once triggered, the internal, motorized multi-port pressure distribution valve automatically sequences the cycle by routing regulated city water pressure or compressed air (35 to 40 PSI) to actuate large, diaphragm-style face-piping valves one tank at a time. This progressive execution ensures stable hydraulic balancing across the pool equipment pad, preventing sudden pressure drops while incorporating specialized safeguards like a built-in "Fireman's Delay" heater cool-down relay and main pump interlocks to eliminate any risk of thermal stress or mechanical cavitation. Housed inside a rugged, weather-resistant, and NEMA-rated non-corrosive enclosure to withstand harsh chemical environments, the controller also includes a backlit LCD status display, digital alarms, saved backwash history logs, and seamless connectivity mapping to master filtration room networks like the Acu-Trol AK600. The dry product weight of the Pentair CS400-02 Semi-Automatic Backwash Controller is approximately 25 pounds (with a packaged shipping weight of roughly 26 pounds including internal pressure regulators and installation hardware), providing commercial operators with an incredibly efficient, water-saving, and highly dependable fluid-management solution.