Water Supply, Distribution and Heaters Flashcards
Understand the installation, maintenance, and regulations of water heaters, along with water supply distribution systems and best practices.
True or False:
When an existing metal pipe is used for electrical grounding, that pipe can be replaced with plastic, and the grounding may be left disconnected.
False
What is not considered an option for an individual water supply?
surface water
Fill in the blank:
Where pumps for individual water supply are installed in basements, the pump must be mounted not less than ______ inches above the floor.
18 inches
Fill in the blank:
The required horizontal separation distance for a water service pipe from a building sewer shall not apply if the water service pipe is a minimum of ______ inches above the building sewer.
12
What is the minimum flow rate in gallons per minute for a private lavatory?
0.8
What is the minimum flow pressure in psi for a bathtub?
20
What is the maximum flow rate for a water closet per flush cycle?
1.6 gpm
What is the maximum static water pressure to be allowed within the building?
80 psi
What is the minimum fixture water supply pipe size for a bathtub?
1/2 inch
Fill in the blank:
A water hammer arrestor shall be installed where ______ valves are utilized.
quick-closing
Fill in the blank:
______ shall be provided to all flexible water connectors.
Access
Where is a full-open valve not required?
fixture supply
Fill in the blank:
Overflow outlets for water supply tanks shall discharge to a point not less than ______ inches above the roof.
6
What is the drain pipe diameter for a water supply tank with a tank capacity of 1600 gallons?
2 inches
Fill in the blank:
A thermal expansion control device is to connect to the water heater ______ pipe.
cold water supply
Which device is not to be installed for high hazard backflow situations?
dual-check-valve
Fill in the blank:
A water softener drain connection shall be connected to the waste system through ______.
an air gap
What is not an approved method for protecting a backflow preventer from freezing?
installed below ground
What is not an approved method for protecting the potable water supply in a lawn irrigation system?
air gap
When disinfecting a potable water system with a chlorine concentration of 50 PPM, how long shall the chlorine stand in the system?
24 hours
When potable water is being used to heat space, what is the maximum temperature of the hot water allowed to be supplied at the potable water fixtures?
140 degrees F
True or False:
A water heater drain valve is required to be provided with female garden hose threads.
False
True or False:
Water heaters and storage tanks should be positioned so that the markings on the tank can be accessed for inspection or reinspection.
True
Fill in the blank:
When installed in an attic, water heaters shall be provided with a passageway not less than ______ inches in height.
30
Fill in the blank:
When installed in an attic, water heaters shall be provided with a passageway with a continuous solid floor not less than ______ inches in width.
24
Fill in the blank:
All water heaters shall be provided with a level working space not less than ______ inches in length and width in front of the control side of the water heater.
30
Fill in the blank:
Access to the cold water valve for a water heater shall be ______.
on the same floor level
True or False:
A pressure relief valve is an approved means for controlling thermal expansion.
False
What is the maximum temperature setting for a temperature and pressure relief valve on a water heater?
210 degrees F
True or False:
The discharge pipe serving a temperature and pressure relief valve shall not be smaller than the diameter of the outlet of the valve served.
True
Fill in the blank:
The discharge pipe for a temperature and pressure relief valve serving a water heater shall terminate not more than ______ inches from the floor.
6
True or False:
A plastic pan may be installed beneath a gas-fired water heater.
False
True or False:
Where a pan drain was not previously installed, a pan shall not be required for a replacement water heater installation.
True
Fill in the blank:
The termination of a drain from a water heater pan shall not be more than ______ inches above the place of termination.
24 inches
What is the insulation R-value requirement for unfired hot water storage tanks?
R 12.5
