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14 terms

Water Supply

Chapter 12 Essentials 5th edtion
STUDY
PLAY
Disadvantage of a direct pumping system
dependence on electricity
Gravity pressure is adequate only when the primary water source is located more than
100 feet higher than the highest point in the water distribution system
What size should water mains be in residential areas
At least 6 inches in diameter
What size should water mains be in industrial areas
At least 8 inches
Spacing of cross connecting mains in a gridded water supply system should be
every 600 feet
What type of water main is usually the nonrising stem type
Gate valves
Which type of pressure can be measured with a pitot tube and gauge
Flow
3 methods of moving water within a system
Direct pumping
Gravity
Combination
dead end hydrant
only receives water from one direction
underground water mains are made of
cast iron, ductile iron, absestos cement, steel, pvc or concrete
static pressure
pressure at a given point in the water system with no water flowing
Residual pressure
the part of the total available pressure that is not used to overcome friction or gravity while orcing water through pipes
california or frost free hydrant
Wet barrel hydrant
3 key components to a water shuttle
attack apparatus
fill apparatus
water tenders