Hi , im after abit of help , i am currently looking around for a combi boilers to replace our old back boiler set up ,
i live in a three bed hse with 7 radiators , which at the minute are being fed from the old manifold under the floor boards via 10mm pipe .
I have a couple of issues im struggling to decide , My first one is
would it be possible to leave the old manifold in and run the combi to it , to feed the rads or do i just rip it out the manifold and run 22mm to each rad and branch down to 15mm ?
Im also struggling to decide which combio to go for . Im planning on fitting a mixer style shower so ideally i need it to be able to supply a good hot water pressure . ive seen the greenstar 37cdi from bosch which is capable of supplying 15l/min , our incoming cold water pressure is more than adequate to maintain this 15l.min so happy on that front its just the gas size im abit stuck with , which is turning out to be a nightmare . Ive checked our gas supply and it appears to be only 3/4 track pipe and on the fitting coming out of the track pipe it says 20mm ...Now im no expert on pipe sizing but doesnt any modern half descent boiler need at least 22mm ? so it apears im well screwed .
Can anyone help me in what to do next . do i go for a smaller boiler or is it possibly for the gas board to come and put abigger track pipe in and increase the pipe upto the meter . which is also only 6m3/hr meter the pipe coming out of the floor looks to be adequate ....
Helllllp......
i live in a three bed hse with 7 radiators , which at the minute are being fed from the old manifold under the floor boards via 10mm pipe .
I have a couple of issues im struggling to decide , My first one is
would it be possible to leave the old manifold in and run the combi to it , to feed the rads or do i just rip it out the manifold and run 22mm to each rad and branch down to 15mm ?
Im also struggling to decide which combio to go for . Im planning on fitting a mixer style shower so ideally i need it to be able to supply a good hot water pressure . ive seen the greenstar 37cdi from bosch which is capable of supplying 15l/min , our incoming cold water pressure is more than adequate to maintain this 15l.min so happy on that front its just the gas size im abit stuck with , which is turning out to be a nightmare . Ive checked our gas supply and it appears to be only 3/4 track pipe and on the fitting coming out of the track pipe it says 20mm ...Now im no expert on pipe sizing but doesnt any modern half descent boiler need at least 22mm ? so it apears im well screwed .
Can anyone help me in what to do next . do i go for a smaller boiler or is it possibly for the gas board to come and put abigger track pipe in and increase the pipe upto the meter . which is also only 6m3/hr meter the pipe coming out of the floor looks to be adequate ....
Helllllp......