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Concrete Coupling by Straub

Municipalities often require design pressures up to 50 psi/345 kPa for sewer lines running near drinking water pipelines, for lines under pressure and even on manhole connections in locations with high water tables. These joints must surpass the specification requirements of CSA A257 or meet ASTM C361. Outside of costly installation methods such as injection grouting, there has not been a cost-effective and easy-to-install solution to meet these requirements – until now.

If you require pressure couplings for pipes made from other materials, please contact your Hamilton Kent representative

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Product Benefits

  • Fast and easy installation
  • Lightweight, low-profile design
  • Cost-effective when compared with traditional methods
  • Compensates for axial movement
  • Bell and spigots do not need to be specially designed
  • Eliminates the need for steel end rings

Hamilton Kent, partnering with Straub, has designed a coupling to meet these requirements. The HK Coupling by Straub is a modern solution designed with either two or three bolts to be lightweight and low-profile, enabling fast and easy installation around all sizes of the straight wall pipe or manhole – including bell and spigot, and tongue and groove joint designs.

The coupling components are specially designed for use with concrete for these applications. The rubber gasket will compensate for minor pipe imperfections such as misalignment, angular deflection, gap, ovality and rough concrete surfaces. The coupling housing is made of 316L stainless steel and lock parts so that it is resistant to corrosion.

Pressure Rating

Couplings by Straub are designed to provide watertight connections up to 50 psi/345 kPa.

Linear Misalignment

1-2% of outer diameter (max 0.25”/6 mm) is admissible. Larger misalignment must be rectified into angular deflection (Cardan principle).

Versions W1, W2 and W5 vary by material and size requirements. Please contact your HK representative for assistance with product selection.

Please contact your HK representative for assistance with product selection.