Maps & Regulations
A map component that helps users understand symbols, shapes, and colors.
legend (map key)
Valves should be exercised at this minimum frequency.
annually?
Flushing helps maintain this residual in the system.
chlorine residual
This type of hydrant is always filled with water and used in non-freezing climates.
wet barrel hydrant
A cross-connection is defined as this type of connection
physical connection between potable and non-potable water sources
This tool allows storage, visualization, and analysis of geographic data for water systems
GIS (Geographic Information System)
The number of turns to shut off a water main valve is typically this...
three times the pipe diameter
This type of flushing uses a planned, high-velocity, one-direction flow
unidirectional flushing
This hydrant type has a main valve located underground.
dry barrel hydrant
This type of backflow occurs when system pressure drops and creates a siphon.
backsiphonage
Maps must be updated when this occurs, such as construction or discovering missing infrastructure.
system changes or inaccuracies discovered?
The national average operability rate of valves is approximately this percentage.
60%
Flushing should generally move water in this direction
from clean to dirty areas
Hydrant color coding: this color represents flows of 1,500+ gpm
light blue
This backflow condition occurs when downstream pressure exceeds system pressure.
backpressure
This regulation requires water systems to maintain accurate distribution maps.
Title 22 §64604?
This is done to confirm whether a valve is functioning without fully shutting down the distribution system.
controlled shutdown test
System pressure should not drop below this level during flushing
20 psi
Hydrants should be opened and closed this way to avoid damage
slowly
This is considered the most protective method of backflow prevention
air gap
These must be included on maps for new facilities, including size, material, and installation year.
as-built plans/maps?
Name one key piece of information recorded during valve exercising.
location, size, number of turns, depth, type, or open direction
Minimum recommended flushing velocity range.
2.5 to 5 feet per second
Unidirectional flushing helps ideally achieve this number of complete water changes in a pipe.
2–3 complete water changes
Under the new CCC Policy Handbook, hazard assessments must be conducted by this timeframe.
by July 1, 2027 (or 2027 depending on context)