Fatter the pipe, higher the flow.

In your case this stops being true when the pipe is so fat the bioiler cant heat the water fast enough.

Rick

On 14 Nov 2003 05:07:14 -0800, (Peter Charlwood) wrote:
Just wondering if anyone has done this before and if there are any
potetial problems with doing it. Also i am installing a combi boiler
and was wondering what sort of pipe size i should use for the
shower/bath.

I would think 10mm would be to small for the shower/bath but doing
really want to go over 15mm due to space. what would be a reason for
having say 22mm pipe over 15mm.

Thanks for your help.

Pete