01:3101:31, 15 February 2018diffhist0
Nominal Pipe Size
Changed 'NB50' example to '50NB', which is a far more common arrangement in Australia: see, eg, https://www.google.com.au/search?ei=MuKEWqPSK4ml0gTvlpLQCQ&q=%2250NB%22+pipe+-honda&oq=%2250NB%22+pipe+-honda&gs_l=psy-ab.3...10850.11884.0.12018.4.4.0.0.0