Clack 2607 WS1CS Control Valve
Advanced 1″ Clack WS1CS control valve for water softeners and filtration systems — featuring microprocessor control, upflow/downflow regeneration, and dual backwash operation.
Since 1991 – Trade-Only wholesale partner

Advanced 1″ Clack WS1CS control valve for water softeners and filtration systems — featuring microprocessor control, upflow/downflow regeneration, and dual backwash operation.
The Clack WS1CS Control Valve is a precision-engineered 1″ valve designed for advanced water softening and filtration systems. Built with Clack’s trusted solid-state microprocessor, it provides accurate control, easy setup, and exceptional reliability.
Its intelligent design allows multiple regeneration modes — including meter immediate, meter delayed, and time clock delayed — to suit various operational requirements. The WS1CS also features double backwash for improved cleaning efficiency, non-volatile memory retention, and up to 73 pre-programmed regeneration cycles.
Constructed from Noryl® (NSF/ANSI 44, 61, 372 certified), this valve ensures corrosion resistance, chemical durability, and long-term reliability across residential, commercial, and light industrial applications.
Features & Benefits
User-friendly front panel with quick access to all settings
Three operation modes: Meter Immediate, Meter Delayed, Time Clock Delayed
Double backwash capability for optimal resin cleaning
Lithium battery backup and non-volatile memory
Upflow or downflow regeneration for flexible installations
NSF/ANSI certified for quality and safety
Compact design with optional weather cover
| Inlet/Outlet Fittings | ¾″ to 1½″ NPS |
|---|---|
| Cycles | Up to 6 programmable regeneration cycles |
| Valve Material | Noryl® (NSF/ANSI 44, 61, and 372 certified) |
| Regeneration | Upflow or Downflow |
| Service Flow Rate | 27 GPM @ 15 psi drop |
| Backwash Flow Rate | 27 GPM @ 25 psi drop |
| Operating Pressure | 20–125 psi |
| Operating Temperature | 40–110°F (4–43°C) |
| Meter Accuracy | ±5% |
| Flow Rate Range: | 0.25–27 GPM |
| Gallon Range | 20–50,000 gallons |
| Mounting Base | 2½”–8 NPSM |
| Distributor Pilot | 1.050" OD Pipe (¾" NPS) |
| Drain Line | ¾” or 1” NPT |
| Brine Line | ⅜” or ½” OD Poly Tube |
| Height from Top of Tank | 7 ⅜” |
| Weight | 4.5 lbs (2.04 kg) |
| Power Supply | 120V/230V AC to 12V AC Adapter |
| Cycle Times Backwash 1st | 6–16 minutes |
| Cycle Times Regenerate Draw/Slow Rinse | 45–75 min |
| Cycle Times Fast Rinse | 3–10 minutes |
| Cycle Times Regenerant Refill | Adjustable (programmable) |