So moved into house, has gas for furnace and dryer. It seems that this is a gas line for the range, what I do not understand is the smaller pipe leaving the valve and off behind the wall. could it close loop or just vent? Havent tried to pill out from wall, it is an exterior wall Brick home, does not protrude to the outside.
Has electric range, but if this is gas the new range will be gas.
Thanks in advance
Gas Line? Vent Line attached to valve
natural-gas
Related Solutions
It might be a small leak or several very small leaks. I had a leak in my Philadelphia home for years and had no clue. During remodel, I replaced the gas pipes (same appliances), and my gas bill unexpectedly went down by $50 for the summer months. A bubble test will not do. Obtain a real gas leak tester, and thoroughly and methodically test each joint.
Do not use pipe dope. The secret to making gas tight fittings is to screw in each connection until only one or two threads are showing. Yellow Teflon tape makes this easier, but it is not a requirement. It can take up to 24 hours for the steel pipe to seal up, so do not expect it to immediately be gas tight. A 16 inch (or longer) pipe wrench also makes this easy, but it is still quite a workout.
Yes, there will be natural gas in the line. It should be at a pressure of about seven inches of water column (equivalent to 1/50 atmosphere, 0.02 bar, and 0.25 psi). If there is a really long and fat pressurized pipe (50+ feet of 3/4 inch) in the system, opening could release a few cubic inches of gas. But it is going to rapidly dissipate and float away. Natural gas is buoyant; propane sinks and accumulates in low places. Personally, I wouldn't worry about gas in the line. Just opening a nearby window is more than enough. (Of course, I don't smoke either.)
There is no reason for a plumber to lay pipe. This is something anyone can do. Homeowners are, in my experience, more likely to do a better job because the professionals don't have to live with the installation.
As long as you do a good pressure test, you can assure yourself and your loved ones that it was done well.
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Best Answer
The flare fitting seems to indicate that it is gas supply tubing that leads to an appliance of some sort. It must lead to a gas dryer, gas cooker, gas grill, gas water heater, or gas fireplace (or did at one time). The valve is OFF, so there should be no harm disconnecting the old line and using the line to supply whatever you want; obviously whatever it leads (or led) to is not in service.