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Piping Systems & Welding

Closure Coupling


Closure Coupling

For Duo-Pro® Double Wall Environment Piping Systems

Alternative method of installing Duo-Pro® double contained piping systems. The coupling slips over the outside diameter of the pipe, allowing the carrier to be welded and pressure tested before sealing the containment.


Data Sheet

Ideal Applications Include:

For use with Duo-Pro® double containment piping systems.

Supply Range

Size Range:

3" (90mm) - 8" (200mm)


Pro150, Pro45


Polypropylene Electrofusion

  • Ideal for DuoPro staggered welding
  • Dis-similar material U
  • Independent carrier pressure test
  • Conforms to ASME B31.3
  • Slips over SDR pipe
  • Use existing welding equipment