If your rv has a bypass valve these two pipes will be connected directly to each other using a third pipe.
How to drain rv hot water heater.
Disconnect the hot water.
Pull up on the pressure relief valve at the top of the tank to open it.
Run the hot water inside the rv until it runs cold.
Also if you get into a good habit of draining your tanks when the fall comes it will be as easy as one two and three to drain and get your rv winterized.
Allow the water to drain.
Opening the drain valve 1.
If you have ever been to a hot spring then you will know the smell.
This is to ensure that the water inside the water heater is.
Cold water comes in at the bottom and hot water comes out of the top of the heater.
The lever of the valve should point in the direction that you want the water to flow.
How to drain an rv water heater.
Here are those instructions.
Near the drain valve where the hose is connected is a knob or lever that.
The hot water heater tank will smell especially bad because of the hot water it will start to smell like sulfur.
Locate your water pump and disconnect the water outlet line attach a rubber hose and make sure it is long enough to avoid kinking then fill a 12 ounce jar or can with water.
Outside of the rv open the panel to the water heater.
Run the hot water inside the rv until it turns cold.
At the top of the water heater is a valve.
Turn off the water heater lp gas and water pump.
Turn the knob on the drain valve to open it.
Open the pressure valve and adjust the wrench to loosen the plastic drain plug.