On a nuke, water conservation is more like a suggestion.
If you screw up and wind up filthy during your watch, it isn't that big of a deal to take a shower once you go off duty. True, its a Navy shower but its still a shower. I would go 3 to 4 days between showers when I was underway on the Bremerton. The only real hassle was if COB went on the warpath and tagged out the water heater (it happened) or if you timed out taking your shower to when the boat went to PD.
We could even waste water if we really wanted to. The only hassle would be pumping out the infamous Gray Water Tank (which stank 4 times worse than the infamous Sanitary Tank).
On a diesel, a large % of the water your stills can produce is destined to end up in the battery well(s). Lead/acid batteries without distilled water don't stay batteries for very long.
