15mm to 10mm Radiator Valve Reducer Video
Watch the checks to make before using a one-piece reducer with a 15mm compression radiator valve and 10mm heating pipe.
What the video covers
- Checking that the valve, reducer and 10mm pipe are compatible.
- Using the correct support insert for approved plastic heating pipe.
- Preparing for fitting and checking the completed connection for leaks.
The overview uses explanatory diagrams. Follow the instructions for the exact valve, reducer and pipe system for assembly, orientation and tightening. Cool, isolate and depressurise or drain the heating as appropriate before opening any fitting. Ask a heating installer if you are unsure.
For the parts shown, see our 15mm-to-10mm radiator valve reducers, supplied as a pair. They can be used with compatible copper pipe or approved plastic heating pipe with its specified insert.
Continue with the written advice
Read the guide to using 15mm radiator valves on 10mm pipes for the checks to discuss with your installer, or compare sizes in our radiator valve reducer buying guide.


