Installing Gas Pipe under a slab

Thread Tools

Search this Thread

11-04-10, 03:19 PM

bish80

Member

Thread Starter

Join Date: Apr 2009

Location: Maryland

Posts: 334

Likes: 0

Received 0 Likes on 0 Posts

Installing Gas Pipe under a slab

I have an old kitchen addition that is on a slab. The rest of the house is built with a basement. I have to cut a four foot long channel in the slab so as to run a gas pipe to the stove. Since the walls on either side of the kitchen are exposed brick, there is no way to run the gas line through the walls. My 1"gas pipe(black pipe)is in the basement and runs right up to slab.

So I've cut out this trench (the slab is only 2.5 " thick) and I was going to attach a shutoff valve and continue black-pipe all the way to the stove. My question is do I have to fill the bottom of the channel with cement, to prevent possible rusting of the black pipe? The soil underneath the slab is bone dry. Also, I was thinking about attaching a length of flex pipe (CSST) instead of putting all the little sections of black pipe together, but I've never used it before. Is there anything I should look out for?
Thanks
Scott

11-04-10, 03:46 PM

chandler

Banned. Rule And/Or Policy Violation

Join Date: Dec 2005

Location: USA

Posts: 39,964

Likes: 0

Received 9 Likes on 8 Posts

I doubt your installation will pass the muster. Iron pipe, even black pipe isn't happy when buried, and worse when buried in concrete. Not sure why you can't bore a hole in brick. We do it all the time. I would rather see the pipe exposed to the outside elements and be replaceable than to have it run in concrete where it can fail at any time. Sure wish you had posted before you dug that floor up. Check with your local code people to see if it is compliant. You may have to have the gas company come in and run the line to make it safe.

11-04-10, 04:27 PM

shacko

Member

Join Date: Aug 2005

Location: Baltimore County Maryland

Posts: 2,137

Likes: 0

Received 0 Likes on 0 Posts

I think you should check your local regs., a lot of areas require under floor or slab gas lines to be sealed in a sleeve and the sleeve vented.

11-04-10, 08:21 PM

bish80

Member

Thread Starter

Join Date: Apr 2009

Location: Maryland

Posts: 334

Likes: 0

Received 0 Likes on 0 Posts

As usual, I'm not giving enough info. I was not going to bury the pipe, the plan was to keep the trench intact with a cover. The trench will be under a kitchen cabinet and 1/2 of the stove. Although from what you guys are implying, that doesn't seem to cut the mustard either. Also, the reason I can't go through the brick wall is that it is a common wall with the neighbor, I don't think he would like my gas pipe in his den......Although, he might.

Thanks for the info guys, I might have to rethink this

Thread Tools

Search this Thread

Show Printable Version

Email this Page

Plumbing and Piping
1-1/2" vent pipe, move ?????

S

Smith Brother on Nov 03, 2010

Hello, thanks for looking and considering my question. I am going to install a bath faucet coming out of the wall. I ran HEAD ON into the vent pipe. My question is can I ZIG-ZAG it to allow for such? I need to cut the pipe, install a glue a 90 to the left, then a 90 up, then a 90 right, and finish with a 90 up to the pipe going thru the roof that I just cut. I will be going left approx. 8", up approx. 4" then back to original vent pipe going thru the roof. Thank You, Dale in Indy
Plumbing and Piping
Constantly winterizing and dewinterizing mountain cabin

F

f4igrad on Nov 03, 2010

I figured this would be a great place to ask this question, so here it goes. My wife and I have a cabin up in the mountains that we rent out to help offset our costs. This cabin is 3 stories and has 2 bathrooms. It does NOT have central heat/air, but instead has several space heaters as well as propane heaters. We will be renting it sometimes this winter, however it will also be sitting for several weeks completely empty. The cabin is older and the pipes are routed everywhere, including outside walls as well as in the basement/crawlspace area. The previous owners said that they often had a hard time keeping the pipes from freezing when they were living there full time. It would be very costly, and perhaps a bit risky, to run the space heaters and propane heaters while the cabin is unoccupied. Plus, I am not sure that heat would be sufficient to protect the pipes in the outside walls as well as in the crawlspace. We do have a caretaker who cleans the cabin after the renters leave and can do things for us like shut off/turn on the water for renters. This is what we are thinking, and please feel free to advise if you think it isn't enough. 1) purchase RV antifreeze from Wally World 2) after renters leave, have caretaker shut off the water, then open all faucets including outside hose bibb (lowest point in the cabin) 3) flush toilets after water is shut off 4) pour antifreeze in every drain (sinks+showers) as well as in each toilet Before the next renters arrive, have him go back to the cabin and turn the water on, then flush toilets/run water to flush out antifreeze. Thoughts?