What is the required stub-out length for gas pipe installed through a floor, excluding threads?

What is the required stub-out length for gas pipe installed through a floor, excluding threads?

• A. 1 inch
• B. 4 inches
• C. 2 inches
• D. 3 inches

Answer: (C)

The main idea is how much pipe should extend through a floor to allow a safe and accessible connection for a gas appliance or its flexible connector. Two inches is the standard required stub-out length measured from the finished floor surface to the end of the pipe, excluding threads. This provides enough room to attach and tighten the connector without the pipe being too short to reach, while avoiding excessive exposure that could be damaged or impede the floor area. Remember to exclude the threaded portion when measuring, since it isn’t part of the stub-out length. So, the two-inch length is the appropriate requirement.

The main idea is how much pipe should extend through a floor to allow a safe and accessible connection for a gas appliance or its flexible connector. Two inches is the standard required stub-out length measured from the finished floor surface to the end of the pipe, excluding threads. This provides enough room to attach and tighten the connector without the pipe being too short to reach, while avoiding excessive exposure that could be damaged or impede the floor area. Remember to exclude the threaded portion when measuring, since it isn’t part of the stub-out length. So, the two-inch length is the appropriate requirement.