Leaky Valve and Thermal Expansion Tanks
OK heres my issue, I hope someone can help me out here.
I have a 50 gallon natural gas water tank. Its only about 1 year old.
I do NOT have a Thermal Expansion Tank.
The water is incoming at 44 PSI (one way, no backlflow).
My water tank pressure release valve is set to 120 PSI. A new one was installed just a few days ago.
The water temperature setting on the tank is at level 2 of 5 (low).
The pressure release valve on the water tank is leaking and each morning (not always) there is approx. 100-200 ml of water in a small container underneath the pressure release tube. (1/4 to 1/2 a small bottle of waters worth).
The other day i managed to spot the leaking from the tube. I immediatly put a water pressure gauge on both hot and cold water taps. It registered about 130 PSI.
130 PSI seems very high to me and explains the leaking from the valve.
Is this "normal" for modern day water heaters ?
Do you suspect a problem with the water heater ? Maybe a thermostat problem ?
Should i simply purchase an Expansion Tank ?
If i purchase an expansion tank does the maximum PSI rating need to be above 130 PSI ? or is 100 PSI sufficient ? What about 60 PSI ? (I'm not sure how they actually work for max. PSI purposes).
Should i get 2 Gallon or 4 Gallon ?
Any help would be appreciated. Thank you.