Bought this for my business for extra handwashing facilities - we've now moved and have no more use for it. Paid $2500.
Tap works on gravity - 5 gallon tank in the top holds fresh water, and the basin drains into a 'grey water' tank underneath which you just pull out and empty when needed. The fresh water tank lifts off so you can fill it up.
There's also a heater - plug the unit in (standard plug) and the water will be heated to a comfy handwashing temperature (not designed for cleaning/sterilizing).
It's on casters and is fairly light so it can be moved around as needed, and it fits through a standard door frame. All stainless steel so easy to keep clean