Fernco adaptor couplings, sometimes referred to as reducer couplings, are designed to connect unadopted drainage pipes with different outside diameters connecting larger drainage pipes to smaller drainage pipes and vice versa. These simple yet effective connectors can be tightened onto pipes using a nut driver and torque wrench, creating a permanent airtight and watertight seal in just seconds. Fernco adaptor couplings are the tried and tested method for connecting unadopted or private drainage systems and with a range developed over 30 years, fernco has an adaptor coupling for almost any pipe configuration. Applications include housing sites, private roads, industrial sites, agriculture land and more. Adaptor couplings are made from 3 component parts: one stepped moulded epdm rubber body with two different diameters on each side, and two stainless steel clamp bands which when tightened create a secure connection. Features & benefits: easy to fit. Simple and versatile. Completely airtight and watertight connection. Provides a quick and efficient method of connecting pipes of different materials and outside diameters. Reliable, tried and tested. An inexpensive option for unadopted private drainage pipes. Size: 335-360 265-290mm