Need help with a proposed gas pipe reroute . The attachment shows a pipe coming out of the floor which tees to another pipe in the wall.
The pipe in the slab needs to be run below floor level, and connect to the pipe inside the wall. There will be a non permanent cover over the pipe as it is new doorway . The wall is not load bearing.
From what I read, a threaded union cannot be enclosed in a wall, so I will have to thread everything together.

 

Guess I could run the new lineto inside the wall, and connect with a section of CSST?

 

I see the pipe coming out of the floor and going into the wall.
There will be a doorway where the pipe is coming out of the floor. Is this all correct ?

I assume you'll be jack hammering the floor to move the pipe ?

 

The pipe is coming out of the slab where a new doorway is. The pipe in the slab is horizontal with an elbow to go vertical. I want to remove the elbow and continue the run to connect with the pipe inside the wall.
I will open the slab with a jackhammer, or whatever can get it done. the depth of the cut will not be that deep.

 

Gas piping should not be buried under a slab.

 

Agreed on that.
This is a 1956 house. Must not have been the requirement then. Hope nobody died to cause the code to change.
The plan is to open up a slot for the pipe into the area beneath the wall. It is not load bearing.
The cut can be covered up in the doorway, but the covering must be removable without major structural damage.
I had the city inspector look at it, and he agreed I could use steel plate and cover it with flooring in the doorway.
I got it apart without cutting the pipes. Connections had enough threads showing so I could tighten them in one direction and that gave clearance on one side to open it up and get a pipe out.

 

There's such a thing as a left-right nipple. Regular threads on one side and left-hand threads on the other. Used with a left-right coupling (I'm not making this up). It performs the same function as a union, but it's all threaded joints. You have to have some play in the piping to use it, and they can be a pain to get both sides started at the same time.

 

After looking at options, I will be running a new gas line from the meter.

 

Good call.


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The pipe inside the wall is galvanized. The run to the garage goes underground. That section is maybe 9 inches deep, and very rusty.
This operation had "mission creep" written all over it.