I have a hydrant outside the barn and am thinking of running water into the barn this spring for a vegetable washing area I'll be installing. What is the best way to bring the water in so that it can be safely shut off in the offseason. I'm zone 5, and the barn is unheated so it gets cold and the ground freezes during the winter. I'm wondering how to keep the supply line from freezing where it comes out of the floor or what type of valve can be put in underground to prevent freezing.