Urgent Question: Rubber Tubing for Gas Line to Stove?

TiagosDadJune 12, 2012

Help! We're renovating our kitchen, and the contractor used a pretty heavy duty rubber tube to bring gas from the line that comes into the house to feed the furnace up through the ceiling to where the stove is in the kitchen. I think he did it this way in order to not have to open the ceiling up in the basement, the tubing is obviously flexible and he was able to thread it to the connection point without too much trouble. He's a home inspector and says that this meets the code requirements. I always thought gas lines needed to be metal. Should I be worried? Do I need to make him fix it or bring someone else in to fix it?

Thank you for reporting this comment. Undo

Do you have a picture? Are you certain it is a rubber line, or could it be coated corrugated stainless steel?

Here is a link that might be useful:

    Bookmark   June 12, 2012 at 12:05PM
Thank you for reporting this comment. Undo

It certainly looked and felt like very thick rubber to me, as it was pretty pliable. The connection end seemed to be coated in rubber as well, which looks different from the picture you linked to. I'll check it when I get home tonight and will take a picture then.

    Bookmark   June 12, 2012 at 12:30PM
Thank you for reporting this comment. Undo

It there is any writing on the piping, photograph that too.

    Bookmark   June 12, 2012 at 4:16PM
Thank you for reporting this comment. Undo

I wasn't able to get a picture last night, but the contractor says that it is in fact the corrugated metal pipe with a rubber sheath. He also says that they tested the connection with some special plumbers' liquid that blows a large blue bubble if there's a leak. Does that sound right to you guys?

    Bookmark   June 13, 2012 at 12:11PM
Thank you for reporting this comment. Undo

The installer may be telling you the truth. Be advised that fuel gases compressed to the liquid stage ( relatively easy with propane, not easy with natural gas ) act as solvents, much like paint thinner. I would not use rubber lines for fuel gases, but metal with rubber outer coating is OK.

    Bookmark   June 13, 2012 at 8:04PM
Thank you for reporting this comment. Undo

At Standard Atmoshoeric pressure to 1psig (the average pressure of natural gas in residential service) the boiling temperature of the gas is -240degF. I doubt seriously if the line would ever get cold enough to condensate to a liquid.

    Bookmark   June 13, 2012 at 8:57PM
Thank you for reporting this comment. Undo

What does the AHJ have to say?

    Bookmark   June 16, 2012 at 7:32AM
Thank you for reporting this comment. Undo

I do not seem to recall that actual flex line (as used for things like outdoor NG grills) is legal inside.

CSST with a covering is legal in many places for the last connection to gas appliance, but it is not designed for repeated movement.

    Bookmark   June 16, 2012 at 8:51AM
Thank you for reporting this comment. Undo

Under the IRC you can plumb the entire gas system with CSST if locally approved.

you can also run natural gas with copper tubing providing the gas is certified to contain equal to or less than 0.3 grains of hydrogen sulfide per 100cu/ft of gas.

gas lines run under a slab must be sleeved and the sleeve must be sealed on the inside end and vented to atmosphere on the outdoor end.

All copper lines run under a slab must be continuous roll pipe or all joints must be "brazed". (No soldeer or mechanical joints under slab).

    Bookmark   June 16, 2012 at 2:47PM
Sign Up to comment
More Discussions
Fed up and ready to tackle my well water issues
I've been reading posts trying to educate myself for...
how to turn off dual water handle on kitchen valves
I need to turn off water to kitchen sink. We have...
Water softener decision for Austin, Texas city water
I want to better protect my plumbing from wear and...
Electric Water Heater Problem
I have an electric water heater; about a month ago...
Details of a new residential water service
I'm in the planning stages of replacement for my 55...
Sponsored Products
Pasta Pot by Alessi
$321.00 | Lumens
Concord Satin Nickel Wallmount Pot-filler Kitchen Faucet
Satin Nickel Lead Free Instant Hot Water Dispenser and Heating Tank
30" Villa Series Stainless Steel Wall-Mount Range Hood - 860 CFM
Signature Hardware
Antique Copper Whitehaus WHKPFCR3-9550 Wall Mount Cross Retractable Kitchen
$559.00 | Blue Bath
Box Stove & Fire Disk Set
$12.99 | zulily
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™