Originally Posted by RedHorse1
Yes! If it still leaks, cycle the valve a few times by hand and tap the valve stem gently with a hammer to seat it. Next chance you get, replace it.
Read the OP post again. My relief valve will drain out the external hatch, no path for water to get in the TT. Check the source, are you sure it’s the relief valve?
If the pressure relief is leaking, first do as Redhorse says. Sometimes they do need to replaced.
Can you post an image of what you are thinking is the pressure relief, as it is outside the TT. If you are getting water inside the TT, from the outside of the water heater compartment, you need to check the caulking all the way around the water heater, as it should not be leaking in past the caulking.