I have purchased 2 vent free fireplaces to install in my home. I called a local plumber and was quoted $700.00 to install them. He intends to connect to the line near the furnance ( the only gas appliance in the home ). He will run a seperate line to each fireplace, one in the basement (30,000 BTU) and one on the main floor (10,000 BTU). A total of 35 feet of gas line is needed. My son (an engineer) and I would like to do this ourselves. Where would we purchase the pipe and other material needed and what is the process?