
Clack WS1TT Water Softener Control Valve
The Clack WS1TT is a powerful solution for water systems that demand flexibility and precision. It features a solid-state microprocessor with an easy-to-navigate front panel for simple setup and operation.
With four ways to initiate regeneration (meter immediate, meter delayed, time clock delayed, or pressure differential) you can fine-tune performance based on real-world usage. The system also allows programming in ppm, French degrees, German degrees, or cubic meters to match your specific measurement standards.
This valve supports up to nine programmable regeneration stages, with adjustable cycle times for each phase. A built-in day override feature, adjustable from 1 to 28 days, adds an extra layer of reliability.
Whether you’re running a high-capacity softening system or managing variable flow rates, the WS1TT provides the control you need with the dependability you expect.
- Backwash and brining ability to 21″ diameter tanks
- Downflow/upflow regeneration
- Stores system configuration and operation data in nonvolatile memory
- Coin Cell Lithium battery back-up with a 24 hour carry over
- Level VI 15-volt output DC power supply provides safe and easy installation
- Control valve design provides optimum service and backwash rates
- Soft/treated water regeneration
- Pre or Post soft/treated water regenerant refill
- Low salt alarm
- 24-hour clock
- Reliable and proven DC drive
- One piece expanding seal spacer stack assembly
- Linearly reciprocating piston operation
Valve Specifications
| Valve Material | Fiber-reinforced composite |
| Inlet/Outlet | ¾” to 1.5” NPS NPT/BSP/Sweat |
| Weight | 16 lbs (shipping weight) |
| Operating Pressure | 20 to 125 psi (1.4 to 8.6 bar) |
| Hydrostatic Test Pressure | 187.5 psi (13 bar) |
| Water Temperature | 40°F to 110°F |
Flow Rates
| Continuous 15 psi (1.03 bar) drop |
28 GPM (6.36 m³/h) |
| Peak 25psi (1.72 Bar) drop |
N/A |
| Cv | 7.28 |
| Backwash | 15 GPM (3.40 m³/h) |
Dimensions
| Mounting Base | 2½”–8 NPSM |
| Height | 7⅜” (187 mm) |
| Riser Tube Dia. | 1.050″ OD Pipe (¾” NPS) |
| Brine Line Dia. | 3/8″ or ½” OD Poly Tube Compression |









