[Tagging] Is it man_made=water_tap?

[Davidoskky]

>> I'll add to this list all those taps that can be activated without a direct manipulation of an object, such as passing your hand in front of a light ray which causes the water to start flowing.
> The objects being manipulated in this case are photons.
>
> Maybe you are being needlessly pedantic or "splitting hairs" (getting lost in the minutiae of details), I'm not sure.  But I think asserting "if there is a valve (and there are many sorts of valves), it's a tap" is fairly clear.

I think your definition is perfectly good. I was just pointing out that 
other kinds of devices using valves exist that don't always require 
manipulation of any object.