Quote:
Originally Posted by adilburak
but isn’t the small piece of tube between the hot and cold lines supposed to have one. Without one wouldn’t the hot and cold waters just mix?
Thank you
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As explained in the link that both John and I posted, the cold water inlet line and crossover line share what is called a 3-way valve. This valve connects 3 lines, but only two at any time can be connected, as one will always be closed off.
When you have the valve open to the water heater, then it at the same time closes off the crossover line.
When you turn the valve to open the crossover line, the it at the same time closes off the inlet line to the water heater.
So you won't have water going into the water heater inlet and the crossover line ever at the same time, it's one or the other utilizing the 3-way valve.
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Now, you have the second 2-way valve on the hot water outlet line. You keep it open to allow hot water out of the tank and into the hot water line....when you also have the bottom inlet line open going into the tank.
During winterization, You will close it though when turn that 3-way valve at the bottom, which then closes off water going into the tank, but is now opening the crossover line to allow antifreeze to be placed into the cold and hot water line.
By closing off the hot water outlet valve, this keeps the tank from backfilling with the anti-freeze that is now coming into the hot water line via the cold water crossover line.
Clear as mud?
Hey no fair 5picker, I had to take a phone call and you beat me to the punch. LOL