those valves direct the output from the valve to one of two possible destinations.
in normal operation cold water comes in the blue tube at the bottom and the bottom valve directs it into the water heater. the heated water comes out and the top valve directs it out the red hose. in this setting no water flows through the clear tube.
in winterize setting cold water comes in the bottom blue hose the the valve directs it out the clear hose. it does not go int the water heater. once through the clear hose the top valve directs it out the red hose. it does not get to the red hose from the water heater.
both valves must be turned 1/4 turn in sync. getting them out of sync will not allow any water to flow either through the tank or through the clear hose.
so yes, these are the water heater bypass valves.
take the anode out to drain the tank after the valves are set to winterize setting. allow the tank to drain. this is a good time to check the anode. either put the existing one back in or put a new new one in. one thing this does is to keep bugs out of the tank. when taking the anode out just open a hot water valve or the pressure relief vale to bleed off any pressure that may remain.
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2015 cardinal model 3825fl
2015 dodge ram 3500 dually
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