Reply To: Ventuiri effect on waterheater

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Avatar photoHarold Kestenholz
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    Consider yet another possibility. Air enters a system with the water as air is always part of water (about 5% by volume.) As bubbles form when water warms a bit, small air pockets form in several parts of the hot water side of the system. When the water pressure drops in the cold water side while cold water taps are open, the pressurized bubbles expand as the water from the water heater/hot water side flows back into the cold water inlet (even through a gravity loop.)

    Isn’t this fun? Three out of four possibilities to choose from. (And a ball check and expansion tank to install.)

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