
Clack WS1.5TT Twin Control Valve
The Clack WS1.5TT is a 1.5-inch control valve that moves water at 204 lpm (12.3 m³/h, 54 gpm) in service and 83 lpm (4.9 m³/h, 22 gpm) during backwash. Its side-port meter comes built in, and the valve ships with a fitting kit to streamline installation.
A solid-state microprocessor sits behind an easy-reach front panel, letting you start regeneration by meter immediate, meter delayed, time-clock delayed, or pressure differential.
Hardness or capacity can be entered in ppm, French or German degrees, or cubic metres, then shaped into as many as nine programmable regeneration steps with custom run times. The result is a valve that fits mid-size systems but offers the control depth usually reserved for larger installations.
- Days override feature; 1 – 28 days available
- Backwash and brining ability for softeners to 24″ diameter tanks, backwash filters to 18”
- Downflow/upflow regeneration
- Stores system configuration and operation data in nonvolatile memory
- Coin Cell Lithium battery back-up with an 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
- 24-hour clock
- Reliable and proven DC drives
- One piece expanding seal spacer stack assembly
- Linearly reciprocating piston operation
Manufacture: Fleck
Model Number: 9000
Valve Size: 3/4″, 1″, or 1-1/4″
NPT/BSP/Sweat
Availability: In-Stock
Valve Specifications
| Valve Material | Fiber-reinforced composite |
| Inlet/Outlet | 1.5 in. NPT or BSPT (female threads, adapters supplied) |
| Cycles | 9 |
Flow Rates (50 psi Inlet) – Valve Alone
| Continuous (15 psi drop) | 54 gpm (204 l min⁻¹) |
| Peak (25 psi drop) | N/A |
| CV (flow at 1 psi drop) | 13.9 |
| Max. Backwash (25 psi drop) | 22 gpm (83 l min⁻¹) |
Regeneration
| Downflow/Upflow | Both |
| Adjustable Cycles | Yes |
| Time Available | 1 – 120 min for backwash/rinse, up to 480 min for pause, other steps as programmed (effective range ≈ 0–480 min) |
| Meter Accuracy Range | ± 5 % |
| Meter Capacity Range (gal.) | ≈ 5 – 1 500 000 gal (0.02 – 5 700 m³) |
Dimensions
| Distributor Pilot | 1.90 in OD (50 mm) / 1.5 in NPS |
| Drain Line | 1 in male elbow, NPT or BSPT |
| Brine Line | ½ in OD poly-tube compression |
| Mounting Base | 4 in – 8 UN thread |
| Height From Top of Tank | 11 in (279 mm) |
Typical Applications
| Water Softener | 12 – 24 in diameter |
| Filter | 12 – 18 in diameter |
| Electrical Rating | Input supply: 100 – 240 VAC, 50/60 Hz (Level VI plug-in power supply) Output to valve: 15 V DC, 500 mA (≈ 7.5 W max) |
| Max. VA | N/A |
| Estimated Shipping Weight | 8.2 kg (≈ 18 lb) |
| Pressure | Working: 20 – 125 psi |
| Temperature | 40 – 110 °F (4 – 43 °C) |









