What is the minimum length of the unthreaded portion of a gas piping outlet extending beyond the surface of a patio?

The minimum length of the unthreaded portion of a gas piping outlet extending beyond the surface of a patio is specified to be 2 inches. This requirement is in place to ensure safety and proper functioning of the gas outlet. By having a minimum length, it helps prevent any obstruction or damage that could be caused by environmental factors such as debris or water, which can accumulate on patios and could lead to corrosion or blockage of the gas outlet.

Additionally, this length provides enough clearance for proper connection and maintenance, ensuring that any installations directly interact safely without coming into contact with the patio surface. This standard is important for both safety compliance and the longevity of the gas piping installation in outdoor settings.