Water Distribution 060201c Flashcards
Where is the groundwater we find
In porous layers of rock,sand, gravel called aquifers
Who established acceptable levels of organic and inorganic matter in drinking water
Health Canada in conjunction with concerned individuals from various provinces
How often should water supplies be tested
Once a year
What’s the max velocity of water in a transmission pipe
Max of 5ft/sec
Maximum static pressure allowed in occupied building
80 psi (550 kpa)
When the pressure in a building exceeds 80 psi or 550kpa what should be installed
Pressure reducing Valve PRV
What’s used in pipes changes of direction to prevent pipes coming apart
Thrust blocks or thrust anchors
Minimum size of water service for single family dwelling
3/4”
Nicks or scratches deeper than what percent of wall thickness are required to be replaced
10%
Where does building distribution piping begin
Begins at the outlet of the water meter
A ball valve or inverted plug valve installed in the water service pipe at a customers property line
Curb cock ( CC)
What stops cannot be opened or closed from ground surface as they are covered over with back fill
Small corporation main stop
The threaded connection of the sadddle is located to point toward the property and with its outlet at an angle of what degree
30 to 45 degrees
Outlet pipe installed with a service bend is called what for 2” or less
Settlement loop or gooseneck
Some types Cold water supply pipes are only suitable for cold water what should they be protected from
Hot water flowing back from water heater
Device keeps temperature of water from exceeding 99c and must be installed top 6” of the tank
Pressure relief valve
Controls on-off function of the heating device and maintains water at a pre set temperature of about 60c fire domestic use
Thermostat
Pressure relief valve must have the outlet directed with a drop tube of same diameter within how many inches of the floor
12”
When an eco control trips
Control must be replaced means something in the tank is malfunctioning
Relief valve piping practices
If steel no threads on open end if copper cut at a 45 degree angle
Minimum static pressure at water service entry
Not less than 200 kpa 30 psi
Sizing a water distribution system what distances have to be kept in mind
Total developed length most remote fixture to property line not longer than 90 metres
After calculation the sum of fixture units needed for building what do you need to check
If there are any added demands from things such as a irrigation system or fire sprinkler system
The intention of water distribution systems
Have all systems function in a manner that will provide adequate pressure and flow to all fixtures under any circumstance
