On 23/05/2013 11:57, Dave Baker wrote:
I want to buy a hose pipe to attach to the outdoor tap at my new house.
Thread size measures up at about 30mm o/d and a tad less than 2mm pitch
which doesn't seem to be any normal BSP size. Is this a standard metric
thread for garden taps?

BSP *is* a standard metric thread in Britain. 7/8" BSP is 30.201mm OD x
1.814 pitch, but it is a very odd size to have on a tap. Most are 3/4" BSP.

Colin Bignell