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[[File:propane_tank_parts.png]][[File:500galpropanetankvalves.jpg]]* Fill valve: Provides the attachment point from the delivery truck and has a safety feature that only allows flow into the tank, referred to as a back check.* Relief valve: Safety valve that monitors the container’s pressure and allows excess pressure to vent in an over-pressure situation.* Service valve: The primary way propane vapor is released from the container.* Float gauge: Indicates the liquid level in a container, typically expressed by percent of container size.* Fixed liquid level gauge: This device is a fixed tube designed specifically for the type and size of container. It indicates maximum allowable liquid level in a container, typically at 80 to 85 percent of container size.A 500-gallon propane tank weights 949 lbs and when 400 gallons of propane is added the weight goes up to 2593 lbs.Tank to house line: For residential runs from tank to house of 150 feet or less it is common to use 3/4 inch outer diameter size of propane line. Copper Pipes are Best for Above Ground Tank line runs while steel pipes are commonly used for underground setups.[[Category:Propane]]