What Are These For In An Outdoor Area Of A Hospital?
Answer: These are emergency showers. An affected person (chemical spills, laboratory mishaps, etc) will pull the level on the top and tepid water (OSHA defined between 60F and 100F) will douse the affected from the shower head (above) and boot sprayer (below). The duration of these showers is required to be 15 full minutes at approximately 20 PSI.
Source: I design these systems.
that's just CUM ! 
and to think all sorts of things such as this in our "drinking water"