On Sun, Oct 7, 2018 at 6:14 PM Rich <rich1...@dp100.com> wrote: > > Instead of > > fire_hydrant:opening=cw > > fire_hydrant:opening=ccw > > > > You need to type: > > fire_hydrant:opening:direction=clockwise > > fire_hydrant:opening:direction=anticlockwise > > > > Also, because the primary usage for `direction` usually relates to > > heading, you could interpret the tag as an answer to the question "in > > what direction does the opening of the fire hydrant face"? > > What about using the standard engineering terms: > > https://en.wikipedia.org/wiki/Screw_thread#Handedness > > fire_hydrant:handedness=right > fire_hydrant:handedness=left
With a typical hydrant valve, a right-hand screw thread becomes 'turn left to open' and vice versa. One hopes that the caps and the valve(s) both open in the same direction, but there are lots of strange old hydrants about. Most of the ones near me have markings like ↶ OPEN or OPEN ↷ on both the caps and the bonnet.
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