Rain gutter-fed actually. Here's my set-up, making "lemonade" out of a city building code requiring any new construction/remodeling project (a garage/studio space) to incorporate a "rainwater reclamation system".

This is 300 gallons worth of "lemonade".







Oh, and tomatoes don't belong on sandwiches. There, I've done it. I always wanted to hijack my own thread.