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Made by Pure Aqua, Inc.



industrial & commercial water treatment systems worldwide by pure aqua, inc.
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Water Filter & Softeners with Clack WS1.25CI Control Valve

Product Description

Clack control valves are state-of-the-art automatic valves that cover a broad range of global applications. They are designed for residential, commercial, and industrial use with sizes up to 3" and flow rates up to 250 GPM (56.8 m3/hr)

As for backwash, the valves can service tanks up to 63" diameter. The cycles can be set for downflow or upflow regeneration, or simply service, backwash, and rinse, and are the easiest valves to service in the industry.

The valves come in different program versions and are controlled by solid state microprocessors with front panel settings and screen display. They are simple to configure for use in multiple tank systems.

The valves have a complete line of accessories including stainless steel flow meters, motorized alternating valves, no hard water bypass and system controllers.


Inlet/Outlet Fittings

¾" to 1.5” NPS


 up to 6

Valve Material 

Noryl (1) or equivalent



Flow Rate


Service @15 psi drop (includes bypass and meter)

28 gpm

Backwash @ 25 psi drop (includes bypass)

15 gpm

Cv Service


Cv Backwash .


Operating Pressures



20 psi – 125 psi

Operating Temperatures



40º – 110º F




. ± 5%

Flow Rate Range.

0.25 – 30 gpm

Gallon Range

20 – 1,500,000 gallons


1000 - 9,999,000 gallons

Dimensions & Weight


Distributor Pilot

1.050" OD Pipe (¾" NPS)

Drain Line

¾” or 1” Male NPT

Brine Line

3 /8” or ½” OD Poly Tube Compression

Mounting Base

2 ½” - 8 NPSM

Height From Top Of Tank

 7 3 /8”


16 lbs.

Electrical Specifications


Supply Voltage

120V AC

Supply Frequency

60 Hz

Output Voltage

12V AC

Output Current

500 mA

Tank Applications


Water Softener

6” – 21” diameter

Water Filter (2)

6” – 16” diameter

Cycles of Operation (Softener / Filter downflow)


1. Backwash 1st


2. Regenerate Draw/Slow Rinse


3. Backwash 2nd


4. Fast Rinse


5. Regenerant Refill


6. Service (downflow)

0.1-99.0 or off

  • Solid state microprocessor with easy access front panel settings 
  • Four methods to initiate regeneration; meter immediate, meter delayed, time clock delayed or pressure differential 
  • Program in ppm, French degrees, German degrees, or cubic meters 
  • Fully programmable regeneration cycle sequence (maximum 9) 
  • Programmable regeneration cycle times 
  • 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 a 24 hour carry over 
  • 12-volt output AC Adapter provides safe and easy installation 
  • Patented one piece expanding seal spacer stack assembly U.S. Patent 6,402,944 
  • Patented linearly reciprocating piston operation U.S. Patent 6,444,127 
  • Control valve design provides optimum service and backwash rates 
  • Pre or Post treated water regenerant refill 
  • Mixing valve option available
  • Low salt alarm 
  • 24-hour clock 
  • Reliable and proven DC drive
[custom-usage] [/custom-usage]
[custom-documents]Clack WS1.25CI Control Valve [/custom-documents]
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