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Large Diameter Standard Couplings

largeCouplings3Fernco supply Flexseal Large Diameter Standard Couplings, which are manufactured to order to suit any outside pipe diameter including sewerage, drainage and low-pressure applications. Fernco can manufacture the biggest flexible couplings in the world.


Fernco can provide Large Diameter Standard Couplings that are manufactured to meet the specific contractor and site requirements - supplied to suit any outside pipe diameter and any size. Fernco can also supply Large Diameter Standard Couplings with nitrile sleeves


  • Can be used with all common pipe materials (clay, concrete, cast and ductile iron, asbestos/ cement, plastic or fibreglass)
  • Easy to install
  • Provide a watertight connection
  • Available in any size to meet site requirements - delivered within 24 hours
  • Unique bolting system on our large diameter standard couplings range



Flexseal Large Diameter Standard Couplings can be used individually or together with bushes, and have many applications in the construction, repair or maintenance of pipelines.

  • As a joint for plain ended pipes
  • Repair of existing pipelines
  • Making post construction connections to existing sewers
  • As a joint between pipes of different sizes or materials.