Pentair Semi-Auto Controller for 05 Tank System

The Pentair Stark™ CS400™ Commercial Semi-Automatic Backwash Controller for a 5-Tank System (Model CS400-05) is an advanced, programmable multi-vessel automation hub designed specifically to optimize the sequential backwashing of massive, five-vessel commercial sand filtration configurations. Ideal for regional water parks, Olympic-sized competition pools, and heavy-duty municipal aquatic complexes utilizing Stark™ or THS Series® horizontal sand filters, this sophisticated control unit eliminates the extreme labor, timing errors, and physical risk associated with manually operating large battery setups. Powered by integrated Acu-Trol® intelligence, the CS400 allows facility operators to safely initiate a comprehensive, multi-stage backwash cycle across all five filter tanks at the single touch of a button, via a programmed external signal from a master room controller (such as the Acu-Trol AK600), or through an optional differential pressure switch. Once triggered, the unit's internal, motorized multiport pressure distribution valve automatically sequences the process by routing regulated city water pressure or compressed air (ideally 35 to 40 PSI) to mechanically actuate the large, diaphragm-style face-piping valves one individual tank at a time. This progressive, one-by-one execution ensures stable hydraulic balancing across the commercial pump room, preventing sudden pressure drops while incorporating critical equipment safeguards—such as a built-in "Fireman's Delay" heater cool-down relay and main circulation pump interlocks to prevent catastrophic mechanical cavitation, water hammer, or thermal shock. The hardware is housed entirely within a heavy-duty, weather-resistant, and NEMA-rated non-corrosive enclosure engineered to withstand humid, chemical-laden environments, and it features an intuitive, backlit LCD status display alongside eight dedicated LED indicators for real-time monitoring of saved backwash history logs and diagnostic alarms. The dry product weight of the Pentair CS400-05 Semi-Automatic Backwash Controller is approximately 25 pounds (with a packaged shipping weight of roughly 26 pounds including the integrated internal pressure regulators, plumbing check valves, and universal mounting hardware), providing commercial water managers with an incredibly dependable, water-conserving, and high-tech fluid-management solution.