15mm or micro bore

14 Feb 2004
Reaction score
United Kingdom
My system has 22mm from boiler along ground floor same on the up stairs to where it reduces to 15mm this then runs the length of the house, at every rad it reduces again to 10mm micro bore. my question is, do i leave the system that way or is it worth changing the micro to 15mm right up to the rads. is changing to 15mm going to improve my systems performance or am i just wasting money.


Sponsored Links
depends...if your microbore is battered or kinked or even half full of sludge then changing it would be a benefit if not then don't bother. It won't hurt anything to go up a pipe size though if you wanted to.

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