A heat pump has a reversing valve, two metering devices and two bypass valves. This allows the unit to provide both A/C and Heat. The diagram above shows a HP (heat pump) in cool mode. The cycle goes like this; 1  The compressor (1) pumps the refrigerant to the reversing valve (2).
Union Gap, Washington. Union Gap redirects here. For the music group, see Gary Puckett & The Union Gap. Union Gap is a city in Yakima County, Washington, United States. As of the 2010 census, the city population was 6,047. Union Gap has a storied history and in recent years has become the retail hub for the entire Yakima Valley as a result of Valley Mall and other thriving businesses being located here.
Pennington Gap is the most populous town in Lee County, Virginia, United States. The population was 1,781 at the 2000 census. The Lee Regional Medical Center was in Pennington Gap until it closed in October 2013, and the United States Penitentiary, Lee is nearby. The Pennington Gap post office was established in 1891.