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Icon Mechanical: 150mm and above Internal Coupling

for a watertight seal where the pipe exterior is inaccessible

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The Flexseal Icon Coupling, a unique coupling which securely seals against the internal surface of two pipes. A secure, permanent, watertight and airtight connection is now guaranteed on pipes from DN150 to DN600 with an internal circular profile.

 made to order inonly 24hrs smallapproved by highways uk small





  • Achieves a secure connection where traditional couplings cannot be used
  • Permanent, watertight and airtight connection is achieved
  • High quality components
  • Installation is simple and carried out with everyday tools
  • Specially designed bushes are available to accommodate small differences in internal diameter, enabling a wide range of pipe combinations to be connected


The Icon coupling features a stainless steel body which compresses the rubber against the internal surfaces of the pipes, when tightened.  Other features include:

  • Available to suit pipes with internal diameters from 150 - 600mm.
  • Overall width of coupling is 130mm
  • Stainless steel components are Grade 1.4301 (304) material
  • Sizes 150mm up to 300mm with single bolt assembly; sizes greater than 300mm with two bolt assembly
  • Seal has tapered end sections for a smooth transition between the pipe bore and the coupling

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Case Studies

Flexseal coupling Innovation set to save Highways England project £240k