Connect this 21.5mm x 40mm Reducer Solvent Weld Waste Fitting onto a solvent weld waste pipe to create a plumbing water waste system. These fittings allow you to easily join a 40mm to a 21.5mm solvent weld waste pipe. This fitting reduces the amount of water flow to match the capacity of a 21.5mm pipe. Sturdy and reliable, this waste fitting provides a lightweight and cost-effective option.