Thanks to everyone for the useful info on the forum. I used to work in plumbing many years ago but things have definitely moved on a lot since then and I would appreciate some specific advice.
I currently have a heat only boiler in garage with header tank in roof space. I upgraded a number of years ago to an unvented hot water cylinder but I am now considering getting a system boiler fitted and pressurizing the central heating/hot water loop. Current boiler is 15 years old and the system has been drained down quite often recently for fitting radiators but takes an age to fill and a number of days to flush out the airlocks. I guess I'm also expecting it to be close to the end of its life.
Most of the central heating is unfortunately in 8mm microbore. My main concern with doing this is if the extra pressure exposes any leaks behind tiled walls/floors for instance. I presume it would more likely be compression fittings that could be problematic than any of the soldered fittings on the main 22mm pipes/manifolds? I realise that there are leak products you can add but how sensible is this with a microbore system as I presume they leave some kind of residue - is there a possibility that this reduces the flow? Also know people that need to top up regularly which sounds like a nightmare and I presume is down to undetected slow seepage somewhere.
I take it this is quite a common upgrade and wonder if anyone can comment on how much of a problem it is in reality?
I currently have a heat only boiler in garage with header tank in roof space. I upgraded a number of years ago to an unvented hot water cylinder but I am now considering getting a system boiler fitted and pressurizing the central heating/hot water loop. Current boiler is 15 years old and the system has been drained down quite often recently for fitting radiators but takes an age to fill and a number of days to flush out the airlocks. I guess I'm also expecting it to be close to the end of its life.
Most of the central heating is unfortunately in 8mm microbore. My main concern with doing this is if the extra pressure exposes any leaks behind tiled walls/floors for instance. I presume it would more likely be compression fittings that could be problematic than any of the soldered fittings on the main 22mm pipes/manifolds? I realise that there are leak products you can add but how sensible is this with a microbore system as I presume they leave some kind of residue - is there a possibility that this reduces the flow? Also know people that need to top up regularly which sounds like a nightmare and I presume is down to undetected slow seepage somewhere.
I take it this is quite a common upgrade and wonder if anyone can comment on how much of a problem it is in reality?