Having used Speedfit for much of my lower floor central heating, and been very pleased with the speed and ease of installation, I'm confused having opened up some of the fitting last night to add a new rad.
Within the room that I took apart so as to add the new rad, some of the speedfit inserts were blackened, I pulled a piece of tissue through the center of a removed insert and a solidly black coloured residue was left on the tissue. It wasn't clumpy, just seemed to be powdery?
I'm wondering what this is as I haven't seen it elsewhere within the house - is it possibly dirt within the system?
For information, I haven't put an inhibitor into the system yet as I have had to drain/refill a fair bit this past year due to renovating the entire house - would this be my best course of action to avoid this dirt/corrosion buildup?
Within the room that I took apart so as to add the new rad, some of the speedfit inserts were blackened, I pulled a piece of tissue through the center of a removed insert and a solidly black coloured residue was left on the tissue. It wasn't clumpy, just seemed to be powdery?
I'm wondering what this is as I haven't seen it elsewhere within the house - is it possibly dirt within the system?
For information, I haven't put an inhibitor into the system yet as I have had to drain/refill a fair bit this past year due to renovating the entire house - would this be my best course of action to avoid this dirt/corrosion buildup?