*Bk 29 Water Utilities Flashcards
Trunk lines are normally constructed of?
Iron or concrete
______ lines normally run beneath a street and parallel to a curb
main
Main lines are constructed of?
Iron pipe
Water is delivered to individual structures by a combination of ______ and ______ lines.
Service and customer
_____ lines run between a main and a water meter
Service
Service lines can be constructed of what?
Iron, copper or galvanized pipe
_____ lines run between a water meter and a structure
Customer
Customer lines can be constructed of what?
Iron, copper, galvanized or plastic pipe
Who is in charge of maintenance for the water metering device and the shut-off valves on either side of a water metering device?
Water utility companies (dwp)
Who is in charge of maintenance for the plumbing starting from the water meter shutoff valve to the structure?
Building owner
Meter boxes and vaults often have a lid which is painted which color?
Blue
What are the two types of water utility shut off valves?
Non indicating and indicating valves
What are the two types of indicating valves?
- Outside stem and yolk (OS&Y)
- Post indicating valve (PIV)
What kind of meter is used to calculate water usage for domestic water services that can use low and high water flows?
Compound
_________ are normally used in domestic services to reduce high water pressures to an acceptable level inside a structure
Pressure reducing valves
What water pressures (psi) are commonly found inside a dwelling?
40-80psi
Multiple water meters used to supply individual occupancies in a commercial building is often referred to as a _______.
Battery
A wet standpipe system is designed to be used by who?
The occupants
Ball and cone valves can be identified by the lack or presence of a nut on the bottom of a valve.
Which valve has the nut on the bottom?
Cone valve (ball valve does not)
Leaks from commercial toilets can be eliminated by removing a cap over the relief valve and using a slot-head screwdriver to turn the relief valve screw inward or outward?
Outward
For a hot water leak inside a structure, where should you look to shut off the appropriate valve?
Water heater or boiler
What else must be shut off if you shut down a hot water line from a water heater?
Turn off gas/electricity.
Instead of shutting down an entire sprinkler system, what is the name of the valve that can be used to shut down the needed area/floor?
Sectional shutoff or zone valve
When an OS&Y valve is shutoff, is the stem visible or not visible?
Not visible
