These valve reducers will convert any 15mm radiator or towel warmer valve to fit 8mm pipework, and because it's nickel plated, you won't see any copper olives sticking out of the bottom of the valve. The pipe reducer is easy to use and a very neat solution to converting the pipe size from 15mm to 8mm. All you do is loosen the locking ring on your valve and insert the pipe reducer, then tighten the valve locking nut. The valve is now ready for use with the smaller pipe - it's as simple as that! This valve reducer will fit any 15mm valve and is suitable for use with both copper and plastic pipework. The tail is 19mm long making it possible to adjust the distance you want the reducer to protrude out of the base of the valve, making it easier to fit to your pipework.