We recently had a water slide installed with no instructions given to us. I was told from a friend that I need to relieve the water flow through the jets before turning on the pump slide. How do I relieve the water flow and what do I do to turn on the slide? The only levers we have is a black one that is used for the pump - another black one that sits atop its own piping - and then the red valve that is attached to the hose that sits next to the slide stairs. Any suggestions?