The Pushfit Waste Overflow Reducer Rubber Adaptor 40mm is a flexible elastomeric fitting designed to connect small-bore flexible overflow pipework (typically 21.5mm) directly into a standard 40mm domestic waste pipe or socket. Manufactured from high-grade, durable synthetic rubber (EPDM or thermoplastic elastomer), this adaptor provides a tight, friction-fit reduction that allows auxiliary overflow drainage to discharge safely into the main waste line.
 
Featuring a tapered exterior rim and flexible internal ribs, the rubber adaptor pushes securely into the socket or cut end of a 40mm push-fit or solvent weld waste pipe. The internal bore expands to create a snug, watertight seal around the incoming overflow pipe without requiring solvent cement, glue, or specialized clamping tools.
 
Ideal for connecting condensation drain lines, water tank overflow pipes, or boiler blow-off discharges into existing under-sink kitchen or utility plumbing, the rubber construction naturally dampens vibration and absorbs pipe movement caused by thermal changes. Resistant to warm water, mild acids, and household detergents, this 40mm rubber reducer adaptor offers professional plumbers and home improvers a simple, leak-proof solution for multi-pipe waste integrations.
 
Pushfit Waste systems are highly adaptable and manufactured to BS EN 1329:2000. They are fully compatible with other systems.