This waste reducer is used when a 32mm waste pipe is connected into a 40mm pipe, usually with the 32mm pipe dropping into the 40mm pipe below it running towards the soil pipe.It is usually used in the branch of a 40mm tee or in one end of a 40mm coupling.This push fit waste system is manufactured in the UK to BS EN 1451 and is British Standard kitemarked.When making a push fit joint, cut the pipe square and remove any burrs, push the pipe into the fitting as far as it will go and then withdraw it by approximately 10mm to allow for any expansion. The joint can be taken apart again if required, but always check that the O ring has not been dislodged from its housing groove in the fitting as this will cause the joint to leak.Click here to read our guide that explains the key differences between push fit and solvent weld waste systems.