[BRENT in 10-uh-C]

The underlying issue with the reason the valves fails is because grit & debris from inside the tank flows thru the valve, and when the Gas Valve stem is turned, it scores the housing and/or stem which causes the valve to leak. This rust & grit will ruin even a stainless steel ball valve.

Once the tank issue has been corrected, you can use a 7° tapered reamer to resurface the A-9190 Gas Valve Body, and then mount the A-9192 Gas Valve into a lathe and make a skim cut on the taper. It doesn't take much to remove the scoring and make a difference. Then use fine valve grinding compound to polish the two mating surfaces and it will be good as new.

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