A lot of theatre productions, in some way, portray water being used. Before, the actions were portrayed mostly by lights and music and what was available to help the audience imagine the action. In more modern times, the stage can be modified, through good plumbing, to endure real, wet water. There are companies that specialize in plumbing for theatre stages.
A very good example of water needed in a show, would be, “Singing in the Rain”. This iconic rain sequence needed many litres of water. Two tanks containing 6000 litres of water each, located offstage, delivered this water through a series of valves, pumps, interlocks and nearly 1 kilometre of flexible pipes. The water is pumped into a holding tank, where the water is warmed for the comfort of the performers, and then to 16 nozzles rigged in above the stage. The water from above creates the downpour of rain. At the same time, water is pumped from beneath the stage to create the pool of water.
When water is used in-house, the stage needs specially engineered decking. Most water is drained back into the holding tanks, ready for recycling for the next performance. This water is extensively filtered through a sand filter as well as an ultra violet filter. This will eliminate bacteria. When the season of a show ends, the water tanks are emptied via hoses to gardens or lawns outside the theatre.
In this way, this plumbing can create any kind of water related effect. You can have dancers in a downpour, or only a few droplets at a picnic. You can even have (fake) blood droplets from above. The water can stop instantly or gradually, whatever is needed during the play. If the water requires heating, 3 phase power is installed.
With this kind of plumbing techniques you can create almost any kind of atmosphere with real water, for all kinds of shows. It’s raining, it’s pouring, became a reality indoors!