Upsizing Pipe

22 Jan 2023
Reaction score
United Kingdom
Hi, Could anyone tell me if it is ok to up the size of pipe from my radiators from 8mm to 15mm?

My current configuration is 22mm from the boiler then it downsize closer to the radiators to 8mm. I would like to upsize from the 8mm to 15mm but in my head i dont think its possible. Might be wrong.

So id be going 22mm > 8mm > 15mm
Sponsored Links
It's possible but its unlikely to solve any problems you may be having.
If you could junk the 8mm entirely (so 22mm >15mm) that would definitely improve flow to radiators

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links