Running Gas Line Through Exterior Wall

Here s what i think i need to do.
Running gas line through exterior wall. I need to run a gas lp line from outside the house to a cooktop in the kitchen. The space between first and 2nd floors is car decking and beams and is finished as well. This drop line is called a riser if it carries gas up to an appliance from a branch line below the. From 1 2 to 1 1 2 pipe the face of a fitting to face of another fitting you add 3 4.
Most domestic gas lines use 1 2 inch 1 27 cm through 1 1 2 inch 3 81 cm black pipe while large commercial projects sometimes use larger fittings up to 8 inch. Drill a hole in the exterior wall and the header from the attic of the same wall. How to run a pipe through a concrete block wall. Other literature simply doesn t mention any problem installing the gas line in a wall.
A heating contractor i ve spoken to proposes running the gas line from our meter in the laundry room through the external wall to the outside of the house along the house wall for 16 18 feet or so and then back into the house where they would be installing a 2nd boiler. The gas line comes to our meter at one end of the house and the owner wants to have a gas burning insert in the fireplace at the other end of the house 50 feet away. Builders use many techniques to run pipe through concrete block walls but the easiest and most efficient way is to use a core drill. To dig the pipe in would mean crossing a driveway in front or going all the way behind and.
The branch line terminates in a drop line which is a vertical pipe dropping down to the appliance from an overhead branch line. If joists are 16 inches on center and pipes run across them at a right angle holes should differ in height by about 3 8 inch. Every gas line and appliance needs to be carefully checked for leakage following installation and prior to use. When i look at actual construction in homes in my area of ca i see the gas lines in walls without sleeves.
The piping inside the house is called the gas supply line or building line. Branch lines run to individual appliances. The holes must follow a straight line across the floor and must ascend or descend so the pipe will be sloped 1 4 inch per foot. This line will feed a second floor range.
Much of the literature i ve read sounds like a gas line can never be run in wall cavities or between floors without sleeving and venting to outdoors. Running csst gas line is the easiest way to run 2nd floor gas lines t. Diy snaking a csst gas line through the wall.