My contractor is about finshed building our new house here in the Philippines. I am installing an electric central hot water heater, but the instructions that came with this water heater (made in Italy) are very confusing and vague.
The water heater does not have a factory installed pressure relief valve like what is usually found mounted either on the side, or on the top of your average American water heater.
All they give you is the valve in a plastic bag and tell you to
"T" it into the cold water inlet side (at least that's the way I understand the instructions). My Filipino plumber don't have a clue either. He has little experience with "central" water heaters, since they are not normally used in this country.
These poorly written instructions make no sense to me ... Since the fuction of a water heater pressure relief valve is to open up in the event that the water heater gets to hot and over-pressurizes the tank, I would think that this pressure relief valve should be
"T"d into the hot water outlet side of the water heater. Then if the tank over-pressurizes, the valve will open and allow hot water and steam to be vented out of the system through an overboard vent pipe (see drawing below):
Here is where I think the valve should be ..... Anyone here agree?
Thank's
Ron
Water heater pressure relief valve confusion
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