Poly-Gib Couplings

WANG Poly-Gib Couplings are a universal mechanical sealing system for HDPE and flanged connections in new or existing pipelines. Stepped and straight couplings, flange adaptors and blank ends are available from DN90 to DN180 with a maximum operating pressure of 1600kpa. Poly-Gib Blank Ends are ideal for domestic connections, water sampling or pressure testing new lines with the ability to tap in the side and end of cap.

Poly-Gib Mechanically Restrained Couplings


  • Manufacturing facility certified to ISO 9001
  • 3-bolt design from sizes DN90-DN180
  • Restrained couplings can be installed without disassembly
  • Poly-Gib Blank Ends do not required thrust blocks to secure
  • No internal stiffener required for HDPE of SDR 11 or less
  • Temperature: -10°C to +60°C
  • Straight Couplings weight: 7.4-10.3kg depending on size
  • Stepped Couplings weight: 9.4-10.4kg depending on size
  • Flange Adaptor weight: 10.4-13.8kg depending on size
  • Blank End weight: 6.3-12.4kg depending on size
  • Captive head configuration on fasteners for single spanner operation
  • Comes pre-lubricated
  • Tapping Pad' on blank end permitting drain flush or sampling point to be added