Section 1 060201abA-060201d Flashcards
What is the minimum slope for drainage pipes
1/4”/ft for 3” and less
1/8”/ft for 4” and above
Where should you not install a water closet
A room that is not properly lighted and ventilated
Where does a building sewer start
1 meter outside the building
What is a building drain
Lowest horizontal piping conducting sewage, clear-water waste, or storm water
What is a branch
Where two or more soil or waste pipes tie together
What is a fixture
a receptacle, appliance, apparatus, or other devices that discharge sewage or clear-water waste
Is a floor drain a fixture
yes
What is a fixture drain
Pipe that connects a trap serving a fixture to another part of a drainage system
What is a fixture outlet pipe
A pipe that connects a waste opening of a fixture to a trap serving the fixture
What is a rainwater leader
A pipe installed to carry storm water
What is a sanitary building drain
A building drain that conducts sewage to a building sewer, from the most upstream pipe serving a water closet
What is a sanitary building sewer
A building sewer that conducts sewage
What is a soil or waste stack
A vertical soil or waste stack that passes through one or more storys
What is a trap arm
The portion of a fixture drain between the trap weir and the vent pipe fitting.
What is the minimum pipe size entering a building
4”
What is the minimum size of a main building clean out?
4”
What are the 2 reasons you need a vent to the atmosphere
Protect the traps
Vent the municipal sewer
Are you allowed to use piping without markings
no
What does a ptrap do
Prevents sewer gases from coming into a building
If a p trap is to be accessible what kind is to be used
Union type ptrap
If ptrap is to be buried what type is used
Solid weld ptrap
What is the maximum directional change allowed for a trap arm
135 degrees
What is the maximum drop for a trap arm
Not larger than its diameter
What is the minimum length of a trap arm
2 times pipe diameter
What is the maximum length of a trap arm
However many quarters fit into the size of pipe
FOR EXAMPLE: if pipe size is 2”; 8 quarters go into 2 inches so max length would be 8 feet
If the pipe size is 4” (1/8”/ft) 24 8ths go into 4 inches so max is 24 feet
What is the max degree changes for a water closet
225
What is the max drop for water closet
1 meter
What is the maximum distance for water closet trap arm
3 meters
What are cleanouts used for
When a system needs cleaning out
When is a backwater valve required
If there is a fixture beneath the adjoining street
Why should a backwater valve be normally open
To properly vent the municipal sewer
What is used on an EFD to prevent it from drying up and letting sewer gases pass
Trap-primer
What is the minimum trap arm length for unvented floor drain
18”
What is the minimum size of floor drain
2” but has to be vented separately
What is the maximum temp of water or steam allowed to enter a sewer system
170 F
Where are you not allowed to install a toilet
In a room that is not properly lighted and ventilated
What is the minimum slope required for drainage pipes
1/4”/ft for 3” and less
1/8”/ft for 4” and over
What is a Building Sewer
A pipe connected to a building drain 1 meter outside the building
What is a building drain
The lowest horizontal piping which conducts sewage, clear-water waste, or storm water.
What is a branch
Where two or drains tie together
What side of a house should vent pipes protrude the roof
Back side
What happens when a drainage system is improperly vented
Allows gasses to enter the home
What is the minimum size of a main stack
3”
What are individual vents
Vents that vent one fixture individually
What is a dual vent
When one vent, vents no more or less than two fixtures (only when connected symmetrically)
What is a flat vent
An individual vent that runs horizontally below flood level rim
What is a branch vent
All small vents tying together
What is a stack vent
A vent that connects to the top of a stack drain that goes through one or more story (stack) to outside air
What is a continuous vent
A vent that is an extension of a vertical section of a branch or fixture drain
What is a wet vent
A soil or waste pipe that also acts as a vent
Starts at the most upstream fixture connection and ends at the most down stream fixture being vented
What is a stack
a drainage pipe that extends through one or more storys
How should a properly done drainage system operate
Should be empty except for air when no fixtures are draining
When is the length of vent piping needed
When sizing a branch vent
When wet venting what is required to protect all traps
Trap arms shall be connected to the system individually
What is the dry vent at the top of a wet vent called
Continuous vent
What size of cleanout required for pipe sizes 3” and under
Same size as pipes
What is the max change of direction on a cleanout
45 degrees
What is a venting system
Pipes and fittings that connect to a drainage system with outside air to protect the traps in the drainage system
What is a cleanout
Access to provide for cleaning and inspection services
What is the flood level rim
The point on a fixture where water will overflow
What must be installed when a flat vent is installed
Cleanout
What is a drain called after a wet vent
A branch
What is the only fixture not allowed to drain into a wet vent
Water closet
What is the maximum number of water closets a wet vent can serve
2 as long as they are connected symmetrically
What is the minimum size of pipe that can penetrate through a roof
3” and must increase one pipe size
What are the two types of roof flashings
Type A: flat roof
Type B: sloped roof
A wet vent can be horizontal or vertical (true/false)
True
What is the minimum size of trap arms or fixture drains allowed to connect to a wet vent
2” except for an EFD can be 3”
What is the maximum number of fixture units allowed per story on a wet vent
4 FU
How many offset are allowed in 1 system
1
What is the maximum length of offsets
1.2 meters for sizes 2”or less
2.5 meters for sizes larger than 2”
When is the only time you can upsize a wet vent
Upstream of an EFD
What is the maximum length of a wet vent
No Maximum
In a hydrostatic test how much water should you have and how long should it hold
3 meters (10 feet) for 15 minutes
What is the minimum pressure for an air test and for how long should it hold
35 kpa for 15 minutes
What are the three problems in a drainage system
Leaks
Blocked drain or clog
Slowly draining fixture
What should you ask a homeowner when servicing a clogged pipe or leak
If they used any drain cleaning chemicals
Where are arterial loop systems found
Municipalities needing large quantities of water
What is the maximum pressure allowed in a building
80 psi (550 kpag)
What are thrust blocks used for
Protect pipe and fittings from coming apart due to forces exerted by pressure
What is the minimum size of water line coming into a building
3/4” (20mm)
All materials used for water distribution systems shall be
AWWA approved
Where does the building distribution piping start
Building isolation valves
What is a settlement loop or gooseneck
Provides flexibility
What number is used to convert between psi and kpa
6.9 (multiply or divide)
At what depth are waterlines buried to prevent freezing
2 meters (6 feet)
What is required if a water distribution is a closed system
Expansion tank
What is the pressure rating on hot water tanks
Can handle 150 psi (1050 kpa)
Tested at 300 psi (2100 kpa)
What are advantages and disadvantages of continuous water heaters
ADVANTAGES: provides a constant supply of water
DISADVANTAGES:large input required
What is the voltage for electric water heaters
120 or 240 volts
What does an anode rod do
Prevents electrolytic deterioration of the hot water tank
On what side is a shut off required on a water heater
Inlet side
What does a dip tube do
Carries incoming cold water to the bottom of tank to prevent mixing with hot water
What must every dip tube have
Anti-siphon
What must you do before firing any domestic hot water tank
Make certain it is full of water
What is an ECO
Energy cut-off
What is the max distance a relief valve pipe should be off the floor
12” (300 mm)
When do you need a recirculating line in a home
30 meters developed length
More than 4 stories high
What is a riser
a water distribution line extending through at least 1 story
What is an air gap
At least 1” or 2 times spout diameter whichever is bigger
What is an air break
At least 1” or 1 pipe diameter whichever is bigger
What are the testing parameters for water distribution systems
700 kpa (100 psi) for 2 hours
What are the 4 types of water closet bowls
-Siphon jet bowl
-Reverse trap bowl
-Washdown bowl
-Blowout bowl
What is the best type of gravity flush bowl
Siphon jet bowl
What are a couple things a blowout bowl needs
Flushometer
1” distribution line
What kind of parts should you use for a water closet
Corrosion resistant
What formula is used to figure out how many hangers you need
Length divided by hanger spacing
Then round up and add 1
What is the number one gas found in sewer systems
Methane gas
What are the steps for sizing branch vents
-2.5.7.1
-Developed length
-Hydraulic Load
- go to sizing chart
How are dual vents sized
Largest trap being served
What are the steps for sizing stack vents
- 2.5.7.1
-Size of stack at base
-FU’s
-Developed length
-Go to tables
