The Hancock Shaker Village, in Massachusetts, is one example of America's many Utopian communities. Photograph by Polly M. Rettig, Landmark Review Project, 1974. The Amana Colonies were one of many utopian colonies established on American soil during the 18th and 19th centuries. There were hundreds of communal utopian experiments in the early United States, and the Shakers alone founded around 20 settlements. While great differences existed between the various utopian communities or colonies, each society shared a common bond in a vision of communal living in a utopian society.
Thermostatic Mixer Valves must shut down completely if the cold water supply is interrupted. This is called a fail safe. Hot water temperatures are often used to control the growth of legionella bacteria. This can lead to a risk of scalding.
The intake manifold directs the air-fuel mixture in the engine to the corresponding cylinder where it is burned to produce power. The coolant flows through the intake manifold to the cylinder heads to reduce engine temperature. Expansion, contraction, and heat from the engine cause the gasket to fail. This will cause coolant passing through the intake manifold to leak. A leaky manifold gasket can also result in air being sucked through the leaky gasket, resulting in a vacuum leak and poor engine performance.