| 摘要 |
A water heater includes a water-tight tank, a cold water in the tank inlet defining a water flow path and a hot water outlet defining a water flow path. A flapp er valve member including a ring section is fixed relative to one of the water inlet and water outlet. A unitary flapper section extends from the ring section and has a permanently biased central rest position extending at least partially across the water flow path of the one of the water inlet and the water outlet. The flapper valve member ma y be secured within a spud mounted to the tank around the one of the water inlet and water outlet. Alternatively, a bushing is fixed relative to the one of the water inlet and water outlet, through which an associated water flow path flows. The ring section extends around a portion of the bushing to support the flapper valve member with respect to the bushing. The flapper section moves out of the water flow path in respons e to water flow and moves into the water flow path in the absence of water flow t o restrict the flow of convection currents.
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