CSST through solid wall

Is it allowed? I have conflicting plumbers. I have a home where CSST goes from inside the home near a furnace, through a solid wood sill plate, under an outside deck, and on to a BBQ grill. I realize that connecters cannot go through walls, but what about CSST? Engineers here will not commit, but say the “pipe meets code”. They will not say that it is allowed through ledgers and sills, from the inside of the home to outside. Home was built in 2005, and no changes have been made to the home since.

Say you?

Answer is NO.

csst-safety-checklist.pdf (145 KB)

Here’s a recent thread. Though no actual code restrictions regarding CSST passing through floors/walls, Most, if not all, manufacturer’s require protection from damage (sleeved) and minimal clearance.



CSST can be routed through wood. The hole should be 1/2" larger than the CSST. Striker plates may be needed if it’s close to the edge of a stud or joist.

CSST outside needs to be protected from damage.

CSST should not be directly connected to movable appliances.

Those are some things that come to mind when reading your post.

Grill qualifies.
Answer is NO.

Maybe it’s a built in grill…

Unless he says its built in its not .Pictures would be nice fluff].:wink:

No grill on the deck, just a small piece of steel pipe vertically through the deck flooring to a cut-off and slip-connector for a grill.

Thanks for responses, but, as with me, no real answer.

Ok its not built in, but its not directly connected to the grill :slight_smile:

Threw wood it does not have to be sleeved, only masonry. 1/2 inch larger hole is for installers to make it easier to run through holes only. Make sure there is proper bonding of gas pipe present.

The thread title says “CSST through solid wall.” If this is the question, the answer is “yes,” CSST can pass through a solid wall.

CSST can also be directly connected to fixed appliances.

For the most part, it can be run in the same manner as black-iron pipe, with some exceptions for sleeves and protection from physical damage.

From Peoples gas calculation guide.

CSST shall not be installed outdoors and shall not be run
underground unless installed in a sleeve or conduit.

A Corrugated Stainless Steel Tubing system utilizing a 2-psig or
½-psig system has the following requirements:

  1. This system can only be provided if a medium-pressure main
    is available.
  2. When regulator(s) and meter(s) are outside, CSST shall
    transition to black pipe at the inside wall and the black pipe
    shall extend outside the wall for “tie-in.”

I’m not familiar with “Peoples GCG,” but your post is consistent with mine.

A little more …sorry the forum is frustrating with its PDF size limit.
This is for my area of course and is several years old…

To it says as long as the the grill is stationary and the csst is protected at the exterior not naked].

We have included information regarding Peoples Energy’s policies
and procedures as well as the City of Chicago Building Code.
Please use this information in conjunction with the National
Fuel Gas Code (NFGC) and the manufacturers’ instructions
provided with your equipment or piping. By following these rules,
you can help ensure that your natural gas installations are safe
and efficient.

Bob, you have email.

Bob …

You folks in Chicago have UNIQUE codes or rules other areas don’t … like conduit at residential wiring I’ve been told. Yours may not be right for Gary.

Jeff Popes is right on.

Yes I always bear that in mind.
Personally I do not follow codes as much as common sense which is why you rarely see me posting them.
I like using laws of physics.

The main areas we differ are conduit electric] and plumbing.
We have stronger union presence.