R
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Guest
I'd be concerned with the idea of cleaning up the threads with a tap each year. If that were the problem, I'd have expected it to be fixed after the first cleaning.
Have you tried installing the valve without the o-ring to see that it has sufficient travel to seat the seal? Have you tried a different valve?
Have you tried installing the valve without the o-ring to see that it has sufficient travel to seat the seal? Have you tried a different valve?