Clack WS1.25 Water Softener Control Valve
The Clack WS1.25 delivers reliable performance with smart, simple control. Its solid-state microprocessor and easy-access front panel make setup and adjustments quick and user-friendly.
Choose from three operation modes: meter immediate, meter delayed, or time clock delayed, for flexible scheduling that matches your system’s needs. The double backwash feature enhances resin cleaning and extends system efficiency.
With 36 built-in regeneration cycles, this valve is ready to handle a wide range of applications with precision and consistency.
Available Sizes
- “1” – 1.25” NPT
- ¾” – 1.5” Sweat
- ¾” – 1.5” Solvent
- ¾” – 1” SharkBite®
- ¾” – 1” John Guest®”
- Days override feature; 1 – 28 days available
- Backwash and brining ability to 21” diameter tanks
- Downflow regeneration
- Stores system configuration and operation data in nonvolatile memory
- Coin Cell Lithium battery back-up with an 8 hour carry over
- Level VI 15-volt output DC power supply provides safe and easy installation
- Patented one piece expanding seal spacer stack assembly
- Patented linearly reciprocating piston operation
- Control valve design provides optimum service and backwash rates
- Pre or Post treated water regenerant refill
- Reliable and proven DC drive
Valve Specifications
| Valve Material | Fiber-Reinforced Composite |
| Inlet/Outlet | ¾”, 1″, 1¼”, 1½” (fitting options, ¾″–1.5″ NPS) |
| Cycles | Up to 6 |
Flow Rates (50 psi Inlet) – Valve Alone
| Continuous (15 psi drop) | 34 GPM |
| Peak (25 psi drop) | N/A |
| CV (flow at 1 psi drop) | 8.8 |
| Max. Backwash (25 psi drop) | 32 GPM |
Regeneration
| Downflow/Upflow | Downflow only |
| Adjustable Cycles | Yes (all six cycles programmable) |
| Time Available | Up to 199 Minutes per Cycle |
Meter Information
| Meter Accuracy Range | ± 5 % |
| Meter Capacity Range (gal.) | 20-50,000 |
Dimensions
| Distributor Pilot | 1.32″ OD Pipe (1″ NPS) or 32 mm OD |
| Drain Line | ¾″ or 1″ NPT |
| Brine Line | ⅜″ or ½″ OD poly tube |
| Mounting Base | 2½″ – 8 NPSM |
| Height From Top of Tank | 7 ⅜″ |
Typical Applications
| Water Softener | 6″ – 21″ Diameter |
| Iron Filter | 6″ – 24″ Diameter |
| Sediment Filter | 6″ – 24″ Diameter |
| Carbon Filter | 6″ – 24″ Diameter |
| Neutralizing Filter | 6″ – 24″ Diameter |
| Injector Brine System | N/A |
| Electrical Rating | Input (power pack): 100–120 VAC or 200–240 VAC, 50/60 Hz → Output 15 V DC, 0.5 A |
| Max. VA | ≈ 7.5 VA (15 V × 0.5 A) |
| Estimated Shipping Weight | Time-Clock valve: 4.5 lb (2 kg) Metered valve: 4.5 lb (2 kg) |
| Pressure | Working: 20 – 125 psi Hydrostatic: N/A |
| Temperature | 40 °– 110 °F |
