Fernco Flexseal Rubber Flexible Standard Drainage Coupling

Formerly known as Flex Seal, Fernco leads the drainage marketplace in providing solutions for those circumstances that can’t be overcome with traditional couplings. These drain couplers are designed to connect and repair pipes of different materials or sizes used in sewerage, drainage and other underground applications. Minor differences in pipe diameters can be accommodated, if your pipe diameters are too different for our couplings please see our adaptor / reducer couplings.

Often referred to as bandseals, the drainage coupler is an EPDM-moulded sleeve wrapped with a shear band and stainless-steel clamping bands at each end. These can be tightened to requirement with a torque wrench or hexagonal nut driver. The Shear band on the standard couplings ensures joint integrity and pipe alignment under load.

To install the couplings please follow the below guide:

1. Mark both pipes from the end to be connected, half the width of the coupling, less the required joint gap, which is usually 10mm.
2. If connecting different diameters, slide the coupling fully onto the smallest pipe.
3. Align the pipes and slide the coupling onto the larger pipe, ensuring the coupling face and marked line are flush. Tighten this clamp band.
4. Position the smaller pipe, ensuring the coupling face and marked line are flush. Tighten this clamp band.
5. Tighten the clamp bands to the recommended torque. Tamp the bedding under the pipe and re-tighten prior to backfilling.

Fernco Flexseal Standard Coupling Product Range are as follows:

Made to adhere to requirements of BS EN 681-1:1996, BS EN 295-4:2013 and BS EN 10088-2:1995 certified by the British Standards Institute (BSI) and made by Fernco. This provides the installer with a reliable product designed to perform in low pressure applications. Please be aware that these couplings are not UV protected and as such, should not be exposed to direct sunlight for longer than 12 months.

If the stepped reduction you require is not listed above, please contact our sales team who are on hand to provide the full range available from Fernco.