Hi.
I need your expert advice. I am trying to get my old system boiler replaced with a combi. THe problem lies with the radiators. My current system is piped in microbore (8mm copper I think). One heating company has advised (stressed!) that i replace all the microbore pipe and radiators due to the increase in pressure from a combi. Another has said thats not true and the pipe and rads will be fine with just a flush, so that the system is clean for when the combi is installed.
Do i really need 15mm pipe and new radiators??
I need your expert advice. I am trying to get my old system boiler replaced with a combi. THe problem lies with the radiators. My current system is piped in microbore (8mm copper I think). One heating company has advised (stressed!) that i replace all the microbore pipe and radiators due to the increase in pressure from a combi. Another has said thats not true and the pipe and rads will be fine with just a flush, so that the system is clean for when the combi is installed.
Do i really need 15mm pipe and new radiators??