My water heater TPR valve was leaking - not much - couple ounces/day. I replaced it. It's still leaking. Not quite as much, but it still dumps a couple ounces/day. Even if both temperature settings are set low (both the same, 120 degrees). Does this mean the water heater is bad? It's a Westinghouse 40 gal electric unit - probably about 8 to 10 years old.