In article jF%uj.7161$0%3.1998@trnddc06,
Winston wrote:

nick hull wrote:
I have a gate valve with a small leak I need to fix.

After removing the gate assembly, you will probably see crud trapped in the
valve seat.
Remove crud and clean innards, lubricate with silicone grease and reassemble.

...Would be my advice.

--Winston

I cannot see or feel any crud. I can feel most of the seat, except the
top where the disk is in the way even when fully open.

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