Opps should have read beleieve the standard pipe thread used in the US is NPT, but have also heard that for gas fittings it may be BSP ? > On 20 Jan 2018, at 15:03, Graeme Clark <cg at skyflyer.co.uk> wrote: > > beleieve the standard pipe thread used in the US is NPT, but have also heard that for gas fittings it may be NPT?