Skip to content Skip to footer

Axial Restraint Couplings for PVC Pipe

Straub restraint couplings absorb the axial forces from increasing internal pressure with an innovative mechanical frictional connection comprised of anchoring teeth. As the internal pressure increases, the teeth engage deeper into the pipe surface, creating the restraint connection. Whether for pressure or suction lines, thin or thick-walled pipe, Straub restraint couplings install quickly, safely and economically.

Used for: Pull-out resistant couplings use a grip ring to join all types of PVC pipes from ¾” to 28” diameter (27mm to 711mm)

Find a Rep Get in Touch

Product Benefits

  • Works with plain-end pipe connections
  • No welding required, saving time and labor
  • Universal connection for multiple types of pipe
  • Prevents axial movement of the pipe
  • Quick and easy installation
  • Flexible connection compensates for misalignment and angular deflection
  • Innovative progressive gripping system – the higher the pressure, the tighter the grip
  • Available in sizes up to 12” (304mm) diameter

With more than 50 years of continuous development and improvement, Straub restraint couplings are comprised of premium materials and designed for easy installation, trouble-free service and a long lifespan. Straub’s patented progressive sealing effect increases the grip on the pipe as the pressure inside the pipe increases, creating a robust and reliable connection.

The maximum temperature for using GRIP couplings on PVC pipe is 86°F (30°C). Aquarise couplings are used for temperatures above this for sizes up to 6” (152mm) in outside diameter. Please contact your local Straub sales representative for more information.