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Flexseal Rubber Flexible Underground Standard Drainage Coupling

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£21.00 Incl. VAT
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Flexseal Standard couplings are designed for sewerage, drainage and low-pressure applications up to 2.5 bar.

Flexseal provide the most extensive range of Standard couplings available in the marketplace, and have revolutionised traditional pipe repair methods over the years.

Flexseal Standard couplings are specifically designed to connect and repair pipelines of different materials or sizes used in sewerage, drainage and other underground applications.

When excavation work is required to repair a damaged pipe, the Flexseal Standard couplings will reduce the amount of time required to fix the problem and will accommodate minor differences in pipe diameter. Larger diameter differences can be installed using a suitably sized bush.

The combination of a durable design and excellent sealing properties enables the Flexseal Standard coupling to provide a reliable seal on rough pipe surfaces such as concrete, and a high performance seal on smooth surfaces such as PVCu.

Standard couplings can be combined with Flexseal Bushes in order to act as an adaptor between pipelines of widely differing outside diameters. The contractor will require a bush when connecting pipes of different materials or sizes i.e. when outside diameters of the joints exceeds 12mm.


  • Durable design ensuring a high performance and reliable seal
  • Stainless steel shear band provides excellent resistance to heavy loads and shear forces
  • Reduces excavation work
  • Complies with WIS 4-41-01 (all public sewers and sewers for adoption)
  • Shear band ensures joint flexibility and pipe alignment
  • High performance sealing properties of the couplings eliminates need for grouting in most applications

When used individually or combined with bushes, the Flexseal Standard couplings have many applications in the construction, repair and maintenance of pipe systems:

  • As a joint for plain ended pipes
  • Repair and maintenance of existing pipelines
  • Connecting short and cut lengths of pipe
  • Making post construction connections to an existing pipeline
  • Reconnection of laterals on renovated sewers
  • Introducing rocker pipe outside manholes or structures


Material EPDM Pipe Diameter 190mm - 215mm
200mm - 225mm
250mm - 275mm
265mm - 290mm
140mm - 165mm
310mm - 335mm
420mm - 445mm
125mm - 150mm
120mm - 137mm
175mm - 200mm
100mm - 115mm
110mm - 125mm
440mm - 465mm
570mm - 600mm
400mm - 425mm
465mm - 490mm
485mm - 510mm
535mm - 560mm
595mm - 620mm
345mm - 370mm
405mm - 430mm
445mm - 470mm
515mm - 540mm
525mm - 550mm
545mm - 570mm
555mm - 580mm
370mm - 395mm
335mm - 360mm
80mm - 95mm
425mm - 450mm
160mm - 185mm
105mm - 121mm
150mm - 175mm
385mm - 410mm
50mm - 65mm
500mm - 525mm
240mm - 265mm
285mm - 310mm
295mm - 320mm
320mm - 345mm
360mm - 385mm
225mm - 250mm


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Questions & Answers


Will the 115mm side tighten down to 110mm?


Yes, this is a straight coupling so each side can go from 100-115mm depending on how much you tighten it. 


What is the length of this product?




5 / 5 2 reviews
Stephen Ashbrook
Reviewing Flexseal 120mm to 137mm Rubber Flexible Standard Drainage Coupling
14th June
Very good quality
Eddie McConnell
Reviewing Flexseal 100mm to 115mm Rubber Flexible Standard Drainage Coupling
4th November 2020
Excellent service. Highly recommended
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Flexseal Rubber Flexible Underground Standard Drainage Coupling

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