Elevator time machine.

The photos below have nothing to do with backflow prevention assemblies or backflow assembly testing. They do however reside in a backflow costumers building in the heart of downtown Seattle.

These gorgeous pieces of machinery were fabricated in the late 1920s to early 1930s their sole mission is to raise and lower elevators, which they have been doing safely and tirelessly for many decades now, and will continue to do so for many decades to come.   Click to Enlarge