Introduction to Water Distribution Systems

Introduction to Water Distribution Systems In private water supply systems, water is drawn from _____. - Correct Ans-a well To help prevent tooth decay, public water distribution systems add _____. - Correct Ans-fluoride A homeowner is having a well installed in an area where the water table is 30 feet below the surface. The type of well installed will most likely be dug or _____. - Correct Ans-driven More gallons per minute can be pumped from a well that is _____. - Correct Ans-deeper To dissolve carbon dioxide and to oxidize iron and manganese, water treatment systems use _____. - Correct Ans-aerators After water is pumped from a river or lake to a water treatment plant, the first step of treatment is _____. - Correct Ans-aeration To protect against corrosion and oxidation, galvanized pipe is electroplated with a coating of _____. - Correct Ans-zinc Water meters are usually installed by _____. - Correct Ans-a city or county employee Any reversed flow of used or nonpotable water into the potable water distribution system is called _____. - Correct Ans-backflow The flow of water in a water distribution system is regulated by a ______. - Correct Ans-valve A water supply line that a plumber is installing requires the close control of flow at all times. To ensure maximum control, the plumber should install a _____. - Correct Ans-globe valve The type of valve used in piping systems with extremely low backpressure is a _____. - Correct Ans-ball-check value The _____ should be installed so that it bypasses the water softener. - Correct Ans-hose bibb The type of valve that reduces the risk of scalding by mixing the water coming from the hot water heater to a preset temperature before it is delivered to the faucet is a _____. - Correct Ans-tempering valve