So when I turn off the rads upstairs you can get heat going to the new rads, so does this mean that the piping size is the issue as suggested by the plumber??
the plumber has upsized the pipes in one room to 22mm joining back to 15mm. now they want to dig up the rest of the floor so they can change all this piping leading to the boiler to 22mm also. I don't think they are looking for 22mm in the floor, they are just replacing the 15mm to 22mm.
it is a plumber we are using. I presume he has checked for a blockage or airlock already, but I can double check with him.
I think he is thinking that if he makes it 22mm from the boiler to the lounge it will be ok, as currently its 15mm and then to 22mm.
sounds like I could do with another...
so just to clarify the 3 rads are currently on 22mm, previously were standard rads on 15mm. not sure of the previous rads but but were standard size etc.
one of the rads started to get hot when the water flowed in but then seems to cool down again.
the old rads worked fine which were single...
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