Gas Valve

Well first the gas is pressure regulated, so very low pressure to deal with....second safety devices like thermocouples that open or close the valve when heat is detected or not...but they can leak just like any other valve, just generally not a noticeable amount...

..."The pressure of natural gas in a home typically ranges from 3 to 7 inches of water column (in WC), equivalent to approximately 0.11 to 0.25 PSI (pounds per square inch). This pressure is regulated by the utility company and maintained within safe limits for residential use.Jul 12, 2021"...

plus, the valve environment may play a factor.

All the old stoves used Robertshaw valves. They are tapered plug and seat valves, similar to the old steam valves. My bluestar range I have now uses their own taper valves made of brass.

Our gas stove has a small leak on one of the burners. Had a guy come out to look at it and his sniffer couldn't detect it. He said he could order a replacement for about $600(!), so we didn't.

Sometimes you could smell it if you walked into the kitchen when the air had not been disturbed for a while. My wife has held a match to one of the burners and it will try to light even though the gas is turned off. It won't stay lit, but it will give a small flash and go out.

At this point, I don't worry about it, but it would be nice to fix it. The stove was manufactured in Italy, and parts are not all that plentiful in the US.

What brand/model or the part number on the valve?

If you go on vacation for a while and come back,flick on a light switch,you could be getting a high altitude view of your house.

If you are mechanically inclined,you could try to disassemble the valve and check the seat for roughness and make certain the it is fully seated when off.

The linkage to the valve from the knob into the valve may be worn and not firmly seating when off,or a leaking seal around the stem.A valve grinding compound might be needed to polish the seat and needle.It may be possible to find a replacement valve of a different brand,or generic type that will work.Consult your local gas company.I would not sleep well with a gas leak in the house.

Send model,brand and images of the stove and valve and maybe someone on the forum can help you find a replacement.

Need to be careful working on valves…

one needs to know what their doing such as the poster.

its been a while since I applied and working in ASME shops… but make sure the valve downs fall in ASME B31. 1 and B31. 3 codes?????? That may be for steam… just putting that out there.

probably need to look at NFPA specs to see the requirements.