I'm in the process of re-doing the rear bath and have removed the hot and cold water lines that go to the sink. There are valves for both the hot and cold water which were tied to a line which went down through the floor. What's the purpose of this? Possibly something for winterizing? Is this something I need to take into consideration when installing the new plumbing? Obviously it doesn't effect the water flow to the sink, so I'm wondering if I really need to install these for the new plumbing. I'll be going with something other than copper.
Thanks in advance.
Todd