Clack WS1EI Control Valve
Electronic 1″ metered control valve with four regeneration options and LCD display. Designed for precise, efficient water treatment in softening and filtration systems.
Description
The Clack WS1EI Control Valve is an advanced 1” electronic metered valve designed for high-efficiency water treatment systems. It offers four selectable regeneration methods—meter immediate, meter delayed, time clock delayed, and pressure differential—making it highly adaptable for various residential, commercial, and industrial applications.
Equipped with a solid-state microprocessor, the WS1EI features an easy-access front panel with a backlit LCD display showing time of day, days until next regeneration, flow rate, and total volume used. This model also provides a double backwash option, enabling superior cleaning performance and longer resin life.
Built with a corrosion-resistant Noryl® body and patented linearly reciprocating piston and expanding seal spacer assembly, the WS1EI guarantees consistent operation, leak-free performance, and long service life. The valve supports upflow or downflow brining and is certified to NSF/ANSI 44, 61, and 372 standards for safe and reliable water treatment performance.
Features & Benefits
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Four regeneration initiation options: meter immediate, meter delayed, time clock, or pressure differential
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LED display for time, flow rate, and total water volume (totalizer)
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Optional double backwash function for optimal regeneration
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Adjustable cycle times for precise operation
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8-hour coin-cell lithium battery backup
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Post-treated water refill for brine tanks
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Upflow or downflow brining regeneration
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Durable Noryl® valve body with low-voltage 12V AC power supply
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Certified to NSF/ANSI 44, 61, and 372
Technical specifications
| Inlet/Outlet Fittings | ¾" to 1.5" NPS |
|---|---|
| Cycles | Up to 6 |
| Valve Material | Noryl® or equivalent |
| Regeneration | Downflow or upflow brining |
| Service Flow Rate | 27 GPM (6.12 m³/h) @ 15 psi drop |
| Backwash Flow Rate | 27 GPM (6.12 m³/h) @ 25 psi drop |
| Operating Pressure | 20–125 psi (1.4–8.6 bar) |
| Operating Temperature | 40–110°F (4–43°C) |
| 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 | 7⅜″ (187 mm) |
| Weight | 4.5 lbs (2.0 kg) |
| Power Supply | 120V/230V AC, 50–60Hz input → 12V AC output (500 mA) |
| Cycle Times (Softener / Filter) | 1–95 min (Backwash 1st), 1–180 min (Brine Draw), 1–95 min (2nd Backwash/Rinse), 0.1–99.0 min (Refill) |
| Tank Application | 6″–21″ diameter tanks (softener or filter) |
| Certifications | NSF/ANSI 44, 61, 372 |
