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John Guest

John Guest ProLock Shut-Off Valve - 3/4 CTS

Part Number: PSEISV28EP
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The John Guest ProLock™ push-fit shut-off valves are easy and quick to install. For use with Cooper, PEX or CPVC, they incorporate Twist-to-Lock feature for added security. No tools, soldering, glue or clamps. The valve can be rotated on the pipe for easy access to the handle. Can be disconnected without damage to tubing. Ideal for emergency repairs or as a permanent installation.

  • Twist-to-Lock Technology
  • For use with Copper, PEX, and CPVC in any combination
  • No tools, soldering, glue or clamps
  • Can be installed on wet lines
  • Can be disconnected without tools
  • Color-coded caps for hot and cold
  • 90 degree on or off position
  • UV Stabilized for outdoor use

Working Pressure & Temperature:
  • Max 160 psi at 73° F
  • Max 100 psi at 180° F
  • Max 80 psi at 200° F

About ProLock: The John Guest ProLock series has been designed with an audible click and visible alignment arrows to assure installers that a fitting is secure. Fittings are ideal for use in water softener/conditioner systems and virtually any OEM type of application involving joining solutions.

ProLock fittings have a collet with stainless steel teeth that grip the pipe when fully inserted, and an O-ring to provide a permanent, leakproof seal. When twisted into place, the locking cap locks the pipe in place securely. No special tools, soldering, clamps or glue are ever required. Fittings reduce installation times by more than 40% and are code-approved for behind-the-wall use.

Application Max Working Pressure Max Working Temperature
160 PSI
100 PSI
80 PSI
73° F
180° F
200° F
California residents Prop 65 Warning
This product contains materials known to the State of California to cause cancer and birth defects or other reproductive harm. www.p65warnings.ca.gov