Sanitary Drainage, Indirect Waste Systems and Storm Drainage Flashcards
Learn about sanitary drainage systems, indirect wastes and compliance requirements.
True or False:
Buildings on separate properties can share a connection to the public sewer.
False
What material is not approved for underground building drainage and vent piping?
glass
What is the minimum slope for a horizontal pipe that is 2 inches in diameter?
1/4” per foot
What is the minimum slope for a horizontal pipe that is 4 inches in diameter?
1/8” per foot
True or False:
Primer is not required for PVC drainage, waste and vent pipe, and fittings in non-pressure applications up to 4” pipe.
True
Fill in the blank:
Horizontal drainage pipes in buildings shall have cleanouts located at intervals of not more than ______ feet.
100
What size cleanout is required for a 3” pipe?
3 inches
A cleanout plug for plastic pipe is required to be which type?
plastic
Fill in the blank:
Cleanouts for 4-inch pipe shall be provided with a clearance of not less than ______ inches.
18
What is the drainage fixture unit value for a residential clothes washer?
2
What is the drainage fixture unit value for a service sink?
2
What is the minimum trap size for a kitchen sink?
1 1/2”
What pipe size is required for a building drain carrying 200 DFU if the pipe has 1/4” per foot slope?
4 inches
What are the maximum drainage fixture units for a 6” building drain having a slope of 1/4” per foot?
840
What is the required pipe size for a vertical stack with the discharge from one branch interval carrying 18 drainage fixture units?
3 inches
What is the required pipe size for a vertical stack with the discharge from three branch intervals carrying 200 drainage fixture units?
4 inches
What is the required pipe size for a vertical stack with the discharge from 5 branch intervals carrying 1200 drainage fixture units?
6 inches
What is the minimum depth of a sump pit for a sewage ejector?
24 inches
Fill in the blank:
The discharge line connection from a sump or ejector to a horizontal drainage pipe shall be located not less than ______ pipe diameters from other stacks or drains.
10
What is the largest drain size that can be replaced by pipe-bursting methods?
6 inches
What is not a concern that indirect waste connections are designed to protect devices and appliances from?
malfunction
Fill in the blank:
Food handling equipment and fixtures shall discharge through an indirect waste connection by means of ______.
an air gap
Fill in the blank:
Floor drain located in walk-in refrigerators shall discharge through an indirect waste connection by means of ______.
an air gap
Fill in the blank:
The discharge from commercial dishwashers shall discharge through an indirect waste connection by means of ______.
either air gap or air break
What is the maximum developed length for a pipe measured horizontally running from a fixture to an indirect waste location?
30 inches
What is the maximum total developed length for a pipe running from a fixture to an indirect waste location?
54 inches
True or False:
Waste receptors for indirect waste shall be permitted in concealed spaces such as crawl spaces, attics, or plenums.
False
Fill in the blank:
A hub drain acting as an indirect waste receptor shall extend not less than ______ above the floor.
1 inch
Fill in the blank:
Standpipes intended for indirect waste shall not extend less than ______ inches above the trap weir.
18 inches
True or False:
A laundry tray is permitted to be connected directly to a washer standpipe above the trap.
True
True or False:
Stormwater shall be drained into sewers intended for sewage only.
False
True or False:
Materials and methods for storm drainage shall be the same as applicable requirements for sanitary drainage systems in Chapter 7.
True
True or False:
Floor drains shall be permitted to be connected to storm drains.
False
Fill in the blank:
The size of storm drain piping shall be based on ______.
gallons per minute flow through the roof drain
Solve for the gallon per minute flow for a roof surface that is 8,000 square feet at a location with 3.25 inches of rainfall intensity per hour.
270
What is the gallon per minute capacity of a vertical leader that is 3”?
92
What is the gallon per minute capacity of a vertical leader that is 4”?
192
What size of storm drain pipe should be installed for a horizontal roof drain that has a slope of 1/8” per foot and a gallon per minute flow of 100 GPM?
4 inches
What size of storm drain pipe should be installed for a horizontal roof drain that has a slope of 1/8” per foot and a gallon per minute flow of 300 GPM?
6 inches
What size of storm drain pipe should be installed for a vertical roof drain that has a gallon per minute flow of 450 GPM?
6 inches
What size is the horizontal gutter if the slope is 1/8” per foot and the flow rate is 39 GPM?
4 inches
What size is the horizontal gutter if the slope is 1/8” per foot and the flow rate is 98 GPM?
6 inches
What is the minimum opening dimension for a scupper for a secondary roof drain?
4 inches
Fill in the blank:
Control devices for flow-controlled roof drain systems shall be protected ______.
by strainers
What is the minimum diameter for a storm or ground water sump pit?
18 inches
