Polypipes Straight Tank Connector extensive waste water management product line comprises acrylonitrile butadiene styrene and modified unplasticized polyvinyl chloride with solvent weld and push fit jointing options. To provide a genuinely flexible solution for a wide range of residential applications, all products are complemented by a diverse range of traps and overflow solutions. White Straight Overflow Tank Connector 21.5mm manufactured by Polypipe Building Products as part of the Waste Systems range - Solvent Weld Overflow System 21.5mm PVC - A.B.S. Features & Benefits: Used to remove excess water, as well as for flood prevention. Normally used alongside sanitaryware, storage tanks, heating systems and other plumbing fixtures.