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27 Cards in this Set
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Water supply system that relies entirely on the force of gravity to create pressure and cause water to flow through the system. The water supply, which is often an elevated tank, is at a higher level than the system |
Gravity System |
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Water supply system supplied directly by a system of pumps rather than elevated storage |
Direct Pumping System |
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Water supply system that is a combination of both gravity and direct pumping systems. It is the most common type of municipal water supply system |
Combination System |
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A principal pipe in a system of pipes for conveying water, especially one installed underground |
Water Main |
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16-72 inch pipe Convey large quantities of water to various points in the distribution system Fire hydrants are rarely attached directly to these mains |
Primary Feeder AKA Arterial Mains |
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12-14 inch pipe Intermediate pipes that interconnect with the primary feeders to create a grid |
Secondary Feeder |
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6-8 inch pipe
Serve individual fire hydrants and commercial and residential consumers |
Distributors |
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Control valve with a solid plate operated by a handle and screw mechanism; rotating the handle moves the plate into or out of the waterway |
Gate Valve |
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Control valve that uses a flat circular plate in a pipe that rotates 90 degrees across the section of pipe to control the flow of water |
Butterfly Valve |
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A type of valve used to control underground water mains that provides a visual means for indicating "open" or "shut" position; found on the supply main of installed fire protection systems |
(PIV) Post Indicator Valve |
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A type of control valve for a sprinkler system in which the position of the center screw indicates whether the valve is open or closed |
(OS&Y) Outside Stem and Yoke |
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Mechanical device installed in a discharge line that senses the amount of water flowing and provides a readout in units of gallons per minute |
Flowmeter |
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A check valve that prevents water from flowing back into a system and contaminating it |
Backflow Preventer |
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Fire hydrant located on a dead-end main that receives water from only one direction |
Dead-end Hydrant |
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Fire hydrant that is located on a secondary feeder or distributor main that receives water from two directions |
Circulating Hydrant |
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Fire hydrant that receives water from two or more directions |
Circulating Feed |
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Water main arranged in a complete circuit so that water will be supplied to a given point from more than one direction |
Loop System AKA Circle System, Circulating System, or Belt System |
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Fire hydrant that has its operating valve located at the base or foot of the hydrant rather than in the barrel of the hydrant. |
Dry-Barrel Hydrant |
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Fire hydrant that has water all the way up to the discharge outlets; may have separate valves for each discharge or one valve for all the discharges. |
Wet-Barrel Hydrant |
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Fire hydrant outlet that is 4 inches in diameter or larger |
Pumper Outlet Nozzle |
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Large diameter outlet, usually 4 1/2 inches, at a hydrant or at the base of an elevated storage container |
Steamer Connection |
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Process of acquiring water from a static source and transferring it into a pump that is above the source's level; atmospheric pressure on the water surface forces the water into the pump where a partial vacuum was created |
Drafting |
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Method of water supply by which mobile water supply apparatus continuously transport water between a fill site and the dump site located near the emergency scene |
Water Shuttle Operation |
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Storage tank used during a relay or shuttle operation to hold water from water tanks or hydrants. This water can then be used to supply attack apparatus |
Portable Tank AKA Catch Basin, Fold-a-Tank, Portable Basin, or Porta-Tank |
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Use of two or more pumpers to move water over a long distance by operating them is series. Water discharged from one pumper flows through hoses to the inlet of the next pumper, and is then pumped to the next pumper in line |
Relay Pumping |
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Standard for Fire Hose Connections |
NFPA 1963 |
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Recommended Practice for Fire Flow Testing and Marking of Hydrants |
NFPA 291 |
