Robohips77 wrote:Agree on copper washer. I have a valve just like, took it apart, and it has the copper washer. Is it copper or brass?
The original equipment is copper. If you need one let me know and I'll drop it in the mail. Sometimes getting the old one out is difficult, and sometimes they just drop out. Be careful not to scratch up the sealing surface below it while digging it out if it's stuck.
At times I have had to reuse one just because it wouldn't gracefully come out, and in a pinch have even dropped a new gasket over the stuck one if it wouldn't stop leaking... but that's a last resort to save a valve after trying the next suggestion:
A little silicone grease or O2 compatible lube on the bonnet threads and sealing surface that touches the copper gasket can reduce friction enough to let the bonnet tighten more and compress an old leaking gasket. That's worked for me before.