Glossary of RV Terms

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Term Definition

A type of built-in couch in an RV that converts into a bed. It often conceals storage compartments.


Every axle has a Gross Axle Weight Rating (GAWR). It is the maximum allowable weight that the components (tires, wheels, brakes) of each axle are designed to support.


Gross combined weight rating (GCWR) is the maximum permissible weight of the tow vehicle and trailer combined when both are fully loaded for travel. GCWR also applies to a motor home towing a vehicle or trailer behind it. GCWR minus GVWR represents the allowable weight for the towed vehicle. Note: The hitch receiver mounted on the towing vehicle must be rated for this amount of weight. If it is rated for less that is the maximum amount you can tow.


An engine powered device fuelled by gasoline, diesel fuel or propane for generating 120-volt AC power.


Ground Fault Interrupters are designed to protect from electrical shock by interrupting a household circuit when there is a difference in the currents in the "hot" and neutral wires.

gray water

Disposal water from the sinks and the shower. In some units, this is held in a tank separate from black water. As with black water, it is dumped in large tanks or dumping station available at most campgrounds.


The gross vehicle weight rating (GVWR) is the maximum allowable total weight of a vehicle or trailer that is loaded, including the weight of the vehicle itself plus fuel, passengers, cargo, and trailer tongue weight.

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