Traditional 3-Valve Water Heater By-Pass
Other valve designs require either three 2-way valves, two 3-way valves, or a 3-way valve and check valve to accommodate water heater bypass.
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Anderson 4-Way Bypass
Anderson's 4-way rotary ball valve design bypasses the water heater in one position and passes cold water to the heater and hot water out in the second position.
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