Ok, I an not a plumber, or even know the basics of plumbing. I am an automotive mechanic which I guess gives me some type of knowledge on how stuff works or I should say, It makes me think I know more then I really do. I crawled under the house and looked for lines. The house we bought was a 1970 house with copper lines. We fully remodeled the house adding a laundry room 14x14. While under the house looking for lines I noticed many many copper lines. But underneath the newly built portion of the house I discovered 1/2 PVC lines which I know run to the sinks in the room. The lines are 8ft from where I would like to install a new outside spigot.

My question is, how do I tell which is the hot water side, and would it be OK to T off the line and run it out the side of the house.

Is there a how to on this subject as well which would tell me what kind of tools it would require and supplies?

Thanks in advance.
Chris

I would run hot water on opposite side of supply, let it run, then feel pipes.
A Plumber would turn off water heater Breaker, Water supply, any valves that would help, open a faucet at a low point to drain water and relieve pressure.
Then run conduit and 90 degree connectors or whatever is needed from faucet to splice point(you will possible use a "T", use primer and glue for PVC or CPVC whichever you are using, turn pipe in fitting while inserting. Do all of your connections with the new faucet open to keep from building pressure.
When dry, turn on water, check for leaks, if none, turn on water heater breaker.

Not sure where you live but in most areas that freeze I would recommend a frostproof spigot. Do not solder with the spigot intact, it must be dsiassembled to avoid melting some plastic parts.