Do you make it more accessible by doing something similar to this?

I work with a very high flow rate (3.5-4 litres a minute) that requires frequent restriction via a control valve to prevent excessive water consumption. Having it right there at my side means that I can stop the flow after rinsing each window if I want to, and having it just draped over my bucket on a belt, secured in place with two protector balls, means I can unattach myself in a second.
I was curious whether any of you guys employed a similar tactic after talking to a couple of wfp'ers last week who were gripping over not having enough water for a full days work. Before our conversation, though, I had noticed just how much water they were wasting simply by not having a means of stopping their water flow ready at hand.