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.
From Wikipedia, the free encyclopedia. Gary Puckett & The Union Gap (initially credited as The Union Gap featuring Gary Puckett) was an American pop rock group active in the late 1960s. Their biggest hits were  Woman, Woman ,  Over You ,  Young Girl , and  Lady Willpower .. It was formed by Gary Puckett, Gary 'Mutha' Withem, Dwight Bement, Kerry Chater, and Paul Wheatbread, who eventually named it The Union Gap.