Polypipe Boss Pipe Rubber Connector Pushfit Waste Adapter Reducer White 40mm x 25mm

Amazon

Push Fit Rubber Adapter Designed to adapt 40mm pipe connections on 25mm pipe and Strap on Boss connectors It can be also used inside the boss shoulders of other fittings such as junction This rubber adaptor is a push fit joint, Weight: 0.0440924524 Pounds, Manufacturer: Tycner

ManoMano

General description Push Fit Rubber Adapter designed to adapt 40mm pipe connections to 25mm pipe and Strap on Boss connectors. Can also be used inside the boss shoulders of other fittings such as junctions. This rubber adaptor features a push fit joint for easy installation.