Hi all

Still deliberating about best way to go wrt combi for showers only.
The current location for the boiler has a mains cold feed fairly close by,
but this is 15mm shared with kitchen sink.
If I wanted to use the combi side of a boiler for running 2 showers (and
maybe the kitchen tap) only, would 15mm be big enough or would it restrict
flow?

TIA

Phil