<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by R L Bagwell:
... no melted vinyl siding like I've done at least once at a prior residence... </div></BLOCKQUOTE>
Sounds like our first Apt when we were married:
I had a small, portable gas grill, that I used on our elevated patio. The patio had indoor/outdoor carpeting, with a rubber membrane underneath.
After a particularly hot cook, about a month before we were moving-out, I noticed that I had melted a large hole or two in the carpeting - necessitating a "midnight replacement" of the carpeting -- I carefully measured and pre-cut, then, after dark, peeled-up the old stuff and glued-down the new.
Saved myself a boatload on what the landlord would've charged me and got all of our security deposit back - which we needed for our new place.
As for the gas line size - I do not know what other gas appliances your place has: furnace, dryer, range? Depending on this stuff, your home will probably have a larger-diameter main pipe coming in from the gas meter, which narrows-down where "drops" are made off of this main line to each connected piece of gas equipment. The concern here would be to insure that the pipe you have is larger than the minimum that would be needed, between the Main Line and your Gas Grill.
Around here, they use plain steel "black pipe" for gas. I would think that if your line is at least 3/4-inch diameter, you should be OK, as long as you're not running your fireplace and ALL grill burners at the same time.
A 1/2-inch or smaller line is probably too "wimpy" for either a big gas grill or a gas fireplace. Some places require galvanized.
So, investigate what you have, if you can. If it looks like a half-incher - see how far an installer would need to go in order to intercept the main line in your house. If you need to have work done, I would contact your local gas utility. Sometimes, for small jobs or for checking stuff like this, they are surprisingly inexpensive - or they could probably recommend local contractors who are certified to do such work.
Hope this helps