WS38B FloPlast 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. Solvent weld waste reducer is manufactured in the UK to BS EN 1455 and is kitemarked. To make a solvent weld joint, first ensure that the outer wall of the pipe and the inner wall of the fitting are both clean and free from grit or swarf. Apply SC250 solvent cement to both surfaces. Push the pipe fully into the fitting and give it a twist to ensure that full contact has been made. Clean off any excess solvent with a damp cloth and leave for 5 minutes to set. The installation should be left for 12 hours before testing.