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Rv water heater air gap.
Your water heater tank is designed with an internal air gap at the top of the tank to reduce the possibility of weeping and dropping.
Prior to storing the rv for the winter all tanks are emptied to prevent damage from freezing see reference 1.
This can happen if you have a weak gas control magnet or if the thermocouple needs to be replaced.
Https amzn to 2nmhbhl years in the making.
Going into this i knew it hasn t been running in a long time so i bought the rebuild kit from pdx in hopes t.
The air gap is actually an expansion tank.
The tanks of rv water heaters are much smaller than those of home water heaters.
If there is no air bubble at the top of the water heater then the water pressure will pop the p t valve every time the burner or element kicks on.
Water being uncompressible will rapidly increase in pressure when heated.
Tons of information th.
Over time the heating water will absorbed this air.
This means that you need to be more conservation minded when using hot water in.
With the air bubble in the top of the tank it just compresses the bubble.
The main manufacturers of tank based rv water heaters are atwood and suburban.
For poor pilot flame you would need to replace the orifice.
In time the expanding water will absorb this air.
There should not be any air bubble in your water heater rv water heaters are not that much different than the ones in our homes.
Filling the rv water heater does not take long.
If it was over heating this would be a steam pocket.
It the temperature pressure relief valve is in an air pocket it will not sense the temperature of the water.
A small home heater is 40 or 50 gallons but as mentioned above an rv water heater may be just six or 10.
For those who do not empty the tanks and use water system antifreeze the system must be flushed prior to use.
If it is not too old hen you can try cleaning the orifice and see how it goes.
The atwood water heater tank is designed with an internal air gap at the tank to reduce the possibility of weeping and dripping.
To replace the air follow these steps.
To replace this air which will correct a.
One of the most common problems with atwood rv water heater is a pilot outage.
Filling an rv water heater is a yearly event.
This is normal expansion of water as it is heated in the closed water system of a recreation vehicle.
This is a book that all of my customers have been receiving from me.