A range of flexible, rubber repair couplings to assist with any underground drainage installation is available to fit the most common sizes of pipe, 110mm & 160mm; we can also supply up to 3000mm in diameter. The couplings will also repair and adapt pipes of varying diameters i.e. a 160mm pipe reducing down to a 110mm pipe. There is a standard range of flexseal repair couplings available on our site but any bespoke size combination can be ordered to suit your own underground drainage system requirements.