Flexseal Drain Couplings are used to connect, repair and maintain drainage systems and other small diameter non-pressure pipelines. Available to suit any pipe material up to 275mm outside diameter, Drain Couplings are designed for use in drainage systems where the resistance to earth loads (usually provided by a Standard Coupling) is not required. Flexseal Drain Couplings comprise a molded EPDM sleeve which is attached using Grade 1.4301 (304) wormdrive stainless steel clamping bands at either end.