We just had our downstairs radiators repiped (as there were individual pipes running down the walls to each radiator which didn't look very nice) and since then our radiators downstairs aren't really getting warm. The guy to did it says it's because our boiler isn't working properly/too small for the house but I suspect it may be the way he repiped it- basically there is a 22mm pipe running from the boiler thru the lenght of the upstairs and he has just dropped a single 10mm pipe from this and T'ed off all 4 of the downstairs radiators off this single 10mm pipe- does that sound like the right thing to do? It is a flow and return system.
Thanks
Thanks