The CS400™ Backwash Controller, by Pentair, has simplified the backwash cycle of Stark™ and THS Series® filtration systems equipped with diaphragm-valve face piping kits. This semi-automatic programmable controller, with Acu-Trol® Intelligence, can backwash up to six (6) filters in sequence via the integral multi-port pressure distribution valve. A backwash can be initiated in three ways: true semi-automatic backwash at the single touch of a button, via an external signal from a master filter room controller such as the Acu-Trol AK600 or by a signal from an optional differential pressure switch for basic, automatic backwash functionality. Features include user-configurable settings, alarms, automatic calculated backwash cycle time and valve control to ensure pump and heater protection prior to the start of the backwash cycle. The enhanced efficiency and economy makes the CS400 one the most eco-friendly commercial backwash controllers on the market.

• Compatible with Stark™ and THS® filters with diaphragm-style backwash valves
• "Advance" feature saves water and energy
• Multi-port pressure distribution valve actuate diaphragm-style backwash valves using city water pressure or compressed air
• Calculated backwash cycle time
• Stored backwash data and history
• Alarms
• Heater cool-down (Fireman's delay)
• Compatible with Acu-Trol® AK600™ multi-body water chemistry and pump room controller
• Connect to networks using the Acu-Trol AcuPort™
• LCD Display