Not sure which route to go for gas line??

**Gnfanatic** · 10-28-2012, 07:32 PM

Hey guys, hope all is well

I am converting my 12x10 breezeway into a kitchen. the breezeway is on a slab which is right next to the house foundation/basement. I need to run a gas line to the other side of the breezeway for the gas stove. What would be the best route?? Cutting into the slab and running a plastic gas pipe OR running black pipe through the attic , down the wall?? The attic is completely exposed (no sheetrock or insulation currently). I need to cut into the slab for the sink drain anyways but not sure what to do with the gas.

I appreciate your help!
Ralph

**MACPLUMB 777** · 10-28-2012, 07:43 PM

Take gas pipe overhead,
never ! Ever ! Under concrete

**Gnfanatic** · 10-28-2012, 07:48 PM

That is what i thought. Obv a few 90 degree and 45 degree bends is going to effect pressure. will 3/4 in line be fine for a 4 burner stove??

thanks!

**Gary Swart** · 10-28-2012, 10:57 PM

May I assume you are pulling permits for this addition? Does your state, county, and/or state allow you to do gas work? Many places are very touchy about these things. If you do your own work without a permit, you could very well have a problem with your insurance. The advice given is correct, but you could be headed for problems.

**Gnfanatic** · 10-29-2012, 04:09 AM

Hey Gary, yes i am. I am doing the rough work and will have the plumber connect it to the main line and pressure test it. thanks

hj · 10-29-2012, 06:50 AM

The city is allowing you to build a room "addition" to the house on a concrete slab that does not have a foundation and footing, which few carport slabs have? I would never let the customer install a gas line because when I test it, it might have to take it apart to repair leaking joints. There are ways to run a gas line under concrete, but they are very specific and expensive, so they are usually only used for natural gas to an island cooktop.

**bluebinky** · 10-29-2012, 08:04 AM

Originally Posted by Gnfanatic

will 3/4 in line be fine for a 4 burner stove??

You will have to recalculate the sizing all the way back to the meter. 3/4", or even 1/2", may be enough, or you may have to replace some or all of the existing pipes to make it right. Can't say without a diagram of what you have. There is a simple procedure spelled out in the code book for figuring this out.

Also, I would leave the combination of plastic+gas to the pros -- including not some handyman at $8/hour.

Assuming you are allowed to, I wouldn't even think about touching any gas piping until after reading, understanding, and then re-reading the code plumbing code. After that, be sure to pull permits and have your work inspected...

All that said, gas piping isn't that hard for a skilled DIYer (after a lot of learning up-front).

**Gnfanatic** · 10-29-2012, 08:30 AM

thanks guys. HJ, this is a 6 inch slab. many houses are built on a slab and of course it has a footing.

hj · 10-29-2012, 02:52 PM

Here, the majority of houses are "built on a slab", but most carport slabs do NOT have foundations, other than "pads" for the support columns.

**Terry** · 10-29-2012, 03:37 PM

A foundation goes below the frost line. I would guess that New Jersey has a more stringent code for foundations because of the colder weather.

**jimbo** · 10-29-2012, 04:43 PM

hj's comments, which mirror my experience....admittely not east coast/cold weather experience.....is that patios, breeseways, etc are not built on the same 'quality' of slab structure as the house itself. I guess you have...or will....verify all this.