Replacing gas cooktop, need to cap off natural gas shutoff valve

[Vdawg]

I am replacing my natural gas cooktop with induction. The house is new (2022 construction) and has a 1/2" brass gas shutoff valve under the cooktop. It has an adapter on the out-feed side to connect the flex supply line that goes to the cooktop. I intend to remove the flex line and adapter from the shutoff valve, leaving the female end, which I want to plug:

When I looked up 1/2" brass plugs on the Lowes website, I found this: https://tinyurl.com/ycxaz94r. It says it's for use with water, but doesn't mention gas. Are there special brass plugs rated specifically for use with natural gas? I could remove the valve, too, and use a galvanized cap on the threaded stub-out, but I'd like to leave the valve in place if possible to allow for more easily going back to gas for a future homeowner who may want that. But if I need a special brass fitting that I can't find, that may be my only option.

 

[Jeff H Young]

a gal or black plug works too also they make a cap to go over the flared fitting often the flare is built into one side of the gas valve and the new house will have a cap on like when the house is ready for new owner and dryer isn't yet installed it often has a valve with cap on end

 

[Sponsor]

 

[Vdawg]

Thanks for your reply. This valve looks like it might be FIP on both ends and the cooktop (out) side appears to have a MIP-to-flared adapter threaded into it to accept the flex line, but I won't be sure until I disassemble it. If so, is it ok to leave that adapter and put a flared cap on it? I read some place that you weren't supposed to reuse flared fittings, but not sure if that applies here. I guess I'd also like to remove that adapter as it's just one more connection that could leak.

 

[John Gayewski]

Use a flare cap.

 

[Vdawg]

Sounds good -- Thanks again!

 

[Vdawg]

Use a flare cap.

No thread sealant on the flare fitting connections, correct?

 

[John Gayewski]

No thread sealant on the flare fitting connections, correct?

Correct

 

[Vdawg]

Thanks again.

 

[Jeff H Young]

Thanks for your reply. This valve looks like it might be FIP on both ends and the cooktop (out) side appears to have a MIP-to-flared adapter threaded into it to accept the flex line, but I won't be sure until I disassemble it. If so, is it ok to leave that adapter and put a flared cap on it? I read some place that you weren't supposed to reuse flared fittings, but not sure if that applies here. I guess I'd also like to remove that adapter as it's just one more connection that could leak.

its not a worry but. a standard cap is better because its stronger than a ball valve but totally safe and rugged. The flare cap is simple safe and easy. A flared gas valve can be reused multiple times but a flexible gas connector the corrugated tubing is recommended for one time use .

 

[Vdawg]

its not a worry but. a standard cap is better because its stronger than a ball valve but totally safe and rugged. The flare cap is simple safe and easy. A flared gas valve can be reused multiple times but a flexible gas connector the couragated tubing is recommended for one time use .

Thanks! I finally disassembled the gas cooktop connection (flex supply) to the gas supply/valve, and it turns out the valve was FIP on the supply side and MIP on the "out" side (not flared). So I ended up getting a standard MIP brass cap and installed it on the valve with thread sealant. I turned the gas on with the valve open and tested for leaks at the cap and on the "in" side of the valve with some leak detector fluid I picked up at the same time and it showed no bubbles. Closed the valve and installed the induction top.

 

[Jeff H Young]

Thanks! I finally disassembled the gas cooktop connection (flex supply) to the gas supply/valve, and it turns out the valve was FIP on the supply side and MIP on the "out" side (not flared). So I ended up getting a standard MIP brass cap and installed it on the valve with thread sealant. I turned the gas on with the valve open and tested for leaks at the cap and on the "in" side of the valve with some leak detector fluid I picked up at the same time and it showed no bubbles. Closed the valve and installed the induction top.

great sounds totally safe !

 

[Vdawg]

great sounds totally safe !

Thanks again for your assistance!