The threaded connection on the tank to the valve is where it appears to be coming from. It doesn't help that the valve sits about 3in down into the water heater so it makes it difficult to see.
Yes I tightened the way you describe. I didn't adjust it afterwards either. It's just weird that it started after 4 years now I can't get it to stop
Edit: The threads on the tank look fine, but the port is about 3in below the outer surface of the water heater so getting a close look is almost impossible
rc10mike OP t1_iyf6wnr wrote
Reply to comment by ICYaLata in Water heater leaking at TPR valve threads by rc10mike
The threaded connection on the tank to the valve is where it appears to be coming from. It doesn't help that the valve sits about 3in down into the water heater so it makes it difficult to see.