Hi I was wondering if you could give some info on changing my pressure switch. It is sticking and my pressure to my home goes high to no water at all. If I tap it it kicks on. Everything seems ok except the switch. When I took off the cover it looks like the points are burnt or just really corroded. My pressure switch is 30-50. I have a new one and I'm going to replace it. So here's my question. When I turn off the breaker and shut off the valve that the water flows through on my tank, there is no where to drain some water out. I know all the wiring and how to take everything apart to replace it, but I'm afraid once i remove the old switch water is going to go everywhere. Do I just let it drain from a faucet? But it still makes me think there will be water in the tank. Please help if you can.