Re: re: 'new laws forcing',..
Maybe just install a box with an impressive-looking nozzle with clamps clearly designed by a Hollywood SFX director for ultra-high pressure operation,with copious safety warnings. And then apologise for it being out of order when (if ever) someone tried to use it.
No need. Just design the plug so that it doesn't fit anything, and then blame the user for not having a compatible device.