The single valve combines the functions of the cold water valve and the bypass valve.
Rv water heater bypass single valve diagram.
Drain the heater and if applicable close the water heater bypass valve otherwise youll need to add an additional 6 10 gallons of antifreeze.
This eliminates the need to fill the water heater tank with 6 gallons of.
You do not have to bypass the water heater when filling the fresh water tank.
When the by pass system is used it takes the cold water going.
Make sure the bottom valve is open and the bypass valve in the middle is closed.
Most rv manufactures today install water heater by pass systems on the rvs they sell.
The first one you mention is to fill the fresh water tank from city water bypassing the rvs internal plumbing.
You may need to remove a cover to access it.
Two different bypass valves.
Now go into your rv and find the heater from the inside.
It is a series of valves or a single lever valve that allows the water flow to be shut off from the water heater and still be pumped to the rest of the hot water piping.
The water heater bypass is used when winterizing the water system.
The water heater by pass system is used to separate the water heater from the rv s plumbing system.
The by pass system can be used to drain the water heater and to winterize the rv water system.
If your rv has a bypass valve these two pipes will be connected directly to each other using a third pipe.
Cold water comes in at the bottom and hot water comes out of the top of the heater.
It is a series of valves or a single lever valve that allows the water flow to be shut off from the water heater and still be pumped to the rest of the hot water piping.