Salons, clinics, tattoo studios and treatment rooms often need hot and cold running water to pass council licensing — even in a room with no plumbing. Here's who it applies to, and what your options are.

Every tattoo station needs one thing before the licensing conversation even starts: somewhere to wash your hands properly, with hot and cold running water, right where you work. Simple in theory - awkward in practice, because half the best studio spaces in the country have no plumbing anywhere near the working area. Here is the short version of what the sink needs to do, and how studios solve it when the building refuses to cooperate.

Not every treatment room comes with a sink where you need one. Here's how aesthetic clinics get hot and cold running water — and licensing-ready hygiene — without any plumbing.