Flexseal Adaptor Couplings, also known as reducer couplings, are designed to connect drainage pipes with different outside diameters. They connect larger drainage pipes to smaller drainage pipes and vice versa. This coupling conforms to standard EN295-4, is made from EPDM Rubber conforming to BS EN681 and features Stainless Steel grade 304. It provides a quick and efficient method of connecting pipes of different materials and outside diameters. This reliable and tested product is available in a large variety of sizes for a multitude of pipe configurations. The Drain Coupling Adaptor 121-136/110-121mm allows for quick and easy repair and maintenance of existing pipe systems. It is an inexpensive option for connecting plain ended pipes of two different sizes and replacing short sections of pipes or small lengths of cut pipe. This adaptive drain coupler is a must-have for any home maintenance project.