Water issues in the hygienic industries

I'm having a lot to do with water issues in hygienic industries at the moment. The EHEDG have a new guidance document out on this that I haven't read yet, but all of the guidance says the same thing, really. I'm pretty sure I can guess what it will say.

Avoid deadlegs, use hygienic materials and methods of construction, etc..

The application of this guidance in practice is where the skill lies....