Thank you for your interesting answers!
I am trying to put together an automatic plant watering system that will use recycled rainwater. I was thinking about using gravity to pour the water and use a small water hose on a gliding rail to move from plant to plant in a linear fashion with a valve to control the water flow. But I'm kind of going in every direction without anything concrete to really start on simply because I didn't know where to start.
I will try to apply what has been said in the posts above and see if I can get something done 