Plumbing

Can you leave old existing pipework when changing from a back boiler to a baxi combi boiler?

Anonymous user 23/02/2024 - 2.47 PM

I have recently had a plumber remove my back boiler and fit a combi boiler and 8 we radiators. Now only 5 out of 8 radiators get hot, the other 3 which are in 2 bedrooms and loft bedroom, only get slightly warm. The plumber told me this is because those 3 radiators are on the old micro bore pipes and are on a 1 way system, the other 5 are running on a 2 way system. I expected new pipes with my new heating system and new bigger radiators but he says I didn't pay enough for that, I paid £3100 cash. Shouldn't he have known my system wouldn't work well and at least advised us of this? He has told us he will change the pipework for £200 but he cannot start the work until the 23rd of December, almost a month after the work was completed. In the meantime, he has advised us to empty some water from the boiler, which is dirty (!) and to turn a valve to turn the pressure bar up. Surely this isn't right, won't I have all the dirt from my old pipes running through my boiler and shouldn't he have changed my old pipes especially the micro bore and fitted a 2 way system? My bedroom temperature when the heating is on constant will only go up to 18c 15c in the loft bedroom. If anyone could give me some advice it would be really appreciated. Thanks, Julie.