Patrick Gourley from Christ’s Church of the Valley in San Dimas, California made in rain during their worship services. Really. Rain.
For their Good Friday services they wanted to juxtapose the idea of desert and dryness with water and life. So they first made a background out of crushed aluminum screening stretched onto frames. The upper center panels were on a counterweight system and raised to reveal a cross during the climax of the service.
Then they installed two rain pipes – one upstage and one downstage of the band. That left the band in the middle of the rain nice and dry. The pipes were made out of ABS with holes drilled every few inches. They hung them with turn buckles to make sure the pipe was level the entire length for consistent flow. Regulators were installed to control intensity of the rain throughout the service. The rain fell into troughs on the floor that were lined with black plastic sheeting. The troughs were built on a slope so water would pool at one end were pumps were located to pump the water outside to a drain. They also filled the troughs with left over screen material which cut down the noise and limited water from splashing out.
They were not able to make it a closed system where the pump would circulate the water due to the height and the pressure that was required to get it to the pipes in the ceiling.
They also took great care and caution with all of the power that was required for band and lighting.