Hi guys,

I'm moving a gas oven 16ft across a room in a kitchen remodel. Both water (copper piping) and gas lines (3/4" black iron) are in the attic overhead. My straightest path to the new range location would result in gas pipe resting directly on both copper water pipes (perpendicular crossing), which run across the joists of the attic floor. The alternate path, by the wall, would have the gas line running on top of (and parallel to) the 3 electric supply lines for the kitchen (yikes!).

So after 2 days of research (and reading the entire gas section of California plumbing code's gas section, twice), it seems I have these options:

A. Elbow(90°) over the water pipes, and back down after them
(5" bridge __l---l__ ).

or

B. Elbow down (45°) down and run under the water pipes and continue straight to target. --\_________

Since plan B means having my gas line resting against the ceiling drywall, I'm concerned about possible puncture from future attachments to kitchen ceiling or problems with placing the recessed lighting later.

So is plan A my best option here? I've read dozens of forums, asked a contractor, and exhausted every resource...

Thanks for your time and advice.

JB

Either go over the pipes with wood supports to raise it above the copper. You do NOT want the steel pipe resting onthe copper. Or, go under the pipes, resting on the ceiling. The only way you are going to damage a steel gas pipe is by drilling through it and you would know you are doing it long before you made a hole. And, if you did make a hole, shame on you for being so obstinate.

some codes require a tee with a nipple and cap rather than a 90 every time you trap a gas line.

Thanks for the reply, I am leaning towards the "over" option, since it means less hole-sawing thru wooden crossbeams. The reason for the elbow "bridge" (rather than just elevating the entire run a few inches) is to avoid having a raised pipe to trip over, and many tall supports or hangers to secure the pipe at that level. I will be spending many hours in this attic running electrical, hood venting, and lighting, and I want this gas pipe out of harm's way from trampling/recessed can boxes. (The blown insulation is deep, making it tricky to see what I'm stepping on, lol).



Edited 1 times.

Yes, I was wondering if I needed a sediment trap for this, but CA code only requires them on upward runs greater than 6". This would be 2-4" up, then 6" horizontal pipe, then back down.

Can't you wrap felt around the copper and allow the gas line to rest on it? Seems like this would be easier and solve the problem. Felt comes in various widths and thickness's I have some 3/8" thick felt lying around here somewhere.