The other day I noticed that my Fumoto T201 had a pretty steady drip. I cleaned it off and found it was coming from the valve itself and not the threads. I bled a little oil through it, closed it, and waited to see the leak stopped. It apparently did, but I called Fumoto anyway to get their opinion. The customer service lady said it would be safest to replace the valve, so they are sending a new one under warranty even though this one is 8 years old.