does any one have any suggestions to what it might be
I only noticed this today, but the funny thing is the one had this problem before I had the combi installed is better than all the others.
The system had jet flo flushed etc and has a magna clean plus some other fancy liquid name to protect the system.
anyone have any ideas, i tried the needle on one of them but makes no difference, so didnt bother checking with the rest?
and anoher plumber asked me to leave the system on for a while.
is this dangerous?
I only noticed this today, but the funny thing is the one had this problem before I had the combi installed is better than all the others.
The system had jet flo flushed etc and has a magna clean plus some other fancy liquid name to protect the system.
anyone have any ideas, i tried the needle on one of them but makes no difference, so didnt bother checking with the rest?
and anoher plumber asked me to leave the system on for a while.
is this dangerous?