I live in a community mobil home in Florida. The sillcock that allows the water to come in from the water supply meter is spurting out water! It's wasteful and expensive! Also the sillcock handle just keeps turning, either way, and doesn't change a thing. How to I know what to buy at the hardware store and how do I get the water at the meter turned off, I'm assuming it will be necessary. Please help as soon as possible!