Gas Lines On Roof

Supply branch and drop lines or risers.

Gas lines on roof.

Sent this to my hvac guy who agrees that it is non standard install but not illegal. It extends straight up through the soffit across the roof and is run down into the home at various points. Buy the right gas pipes and fittings for the job. Obviously you need to reseal the roof around the pipe entry point.

We had a gas line run over the roof and down into a kitchen wall when we redid our kitchen. 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. It just sits on pieces of 4x4 on the roof. The piping inside the house is called the gas supply line or building line.

We will discuss some of the basics of inspecting gas piping. From 1 2 to 1 1 2 pipe the face of a fitting to face of another fitting you add 3 4. Gas furnaces stove dryer i have never seen gas piping run across a roof like this. Are we talking a ground union typically unions are only allowed at the fixture and meter.

But a ground union is allowed outdoors. Branch lines run to individual appliances. Running gas lines on flat roof. The branch line terminates in a drop line which is a vertical pipe dropping down to the appliance from an overhead branch line.