Helpful Plumbing Terms A-B

Boiling Point
 The boiling point refers to the temperature at which a liquid  changes to vapor by the addition of heat
 
BTU
 British Thermal Unit - Unit of heat energy required to raise 1 lb. of water 1 degree F
 
Burner
 A heat producing device where the flame or heat is produced
 
Check Valve
 To allow fluid to flow in only one direction in a pipe; also known as back flow preventer
 
Closed System
 A system where the incoming cold water supply has a device that  will not allow water to expand when heated (i.e. check valve, back flow preventer, some pressure reducing valves)
 
Combustion Chamber
 The location where combustion takes place.
 
Combustion Gases
 Gases released when a gaseous, liquid or solid fuel reacts at an elevated level that needs to be vented with gas or oil-fired water  heaters
 
Commercial Application
 Water heaters used for more than a single family dwelling
 
Condensation
 Formed by more heat being absorbed into the water leaving less temperature to carry the water vapor produced in gas combustion to pass out of  the venting system
 
Conventional Venting
 Atmospheric venting that utilizes the natural convective rise of hot flue gases through the system to release the products of  combustion
 
Cycle
 The number of times a second that a conductor carrying A.C.  returns to the same polarity; generally 60 cycle A.C. is supplied
 
D.C.
 Direct Current - Electrical supply in which the polarity of the  two wires does not change
 
Degree Rise
 Difference between the starting water temperature and the ending temperature after heating is complete
 
Dielectric
 A nonconductor of direct electric current
 
Dip Tube
 Tube inside the water heater

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