The required depth is 18" from finished grade to the top of the service line. Depending on the material your installer chooses to use he may be sleeving it as well, such as if CSST is used (CSST is the yellow plastic jacketed stainless steel tubing you'll notice a lot of these days; most commonly used in fireplace installations). Suitable sleeving could be corlon or abs pipe.
__________________
"The trouble with people idiot-proofing things, is the resulting evolution of the idiot." Me
|