Plumbing code (Storm/Roof Drains) || Already Passed.
1101.1 Scope correct answers The Provisions of this chapter shall govern the materials, design,
construction, and installation of storm drainage
1101.2 Where required correct answers All roofs, paved areas, yards, courts, and courtyards in
buildings shall drain into a separate storm sewer system or a combined sewer system or to an
approved place of disposal.
1101.3 Prohibited drainage correct answers Storm water shall not be drained into sewers
intended for sewage only
1101.4 Tests correct answers The conductors and the building storm drain shall be tested in
accordance with Section 312
1101.5 Change in size correct answers The size of a drainage pipe shall not be reduced in the
direction of flow
1101.6 Fittings and connections correct answers All connections and changes in direction of the
storm drainage system shall be made with approved drainage type fittings in accordance with
Table 706.3. The fittings shall not obstruct or retard flow in the system.
1101.7 Roof Design correct answers Roofs shall be designed for the maximum possible depth of
water that will pond there on as a determined by the relative levels of roof deck and overflow
weirs, scuppers, edges, or serviceable drains in combination with the deflected structural
elements. In determining the maximum possible depth of water, all primary roof drainage means
shall be assumed to be blocked
1101.8 Cleanouts required correct answers Cleanouts shall be installed in the storm drainage
system and shall comply with the provisions of this code for sanitary drainage pipe cleanouts
1101.9 Backwater valves correct answers Storm drainage systems shall be provided with
backwater valves as required for sanitary drainage systems in accordance with Section 715
1102.1 General correct answers The materials and methods utilized for the construction and
installation of storm drainage systems shall comply with this section and applicable provisions of
Chapter 7
1102.2 Inside storm drainage conductors correct answers Inside storm drainage conductors
installed above ground shall conform to on e of the standards listed in Table 702.2
1102.3 Underground building storm drain pipe correct answers Underground building storm
drain pipe shall conform to one of the standards listed in Table 702.2
1102.4 Building storm sewer pipe correct answers Building storm sewer pipe shall conform to
one o the standards listed in Table 1102.4 (Look at table on page 2 in notes)
, 1102.5 Subsoil drain pipe correct answers Subsoil drains shall be open-jointed, horizontally split
or perforated pipe conforming to one of the standards listed in Table 1102.5 (Table on page 3 in
notes)
1102.6 Roof Drains correct answers Roof drains shall conform to ASME A112.21.2 M or ASME
A112.3.1
1102.7 Fittings correct answers Pipe fittings shall be approved for installation with the piping
material installed, and shall conform to the respective pipe s standards or one of the standards
listed in Table 1102.7. The fittings shall not have ledges, shoulders, or reductions capable of
retarding or obstructing flow in the piping. Threaded drainage pipe fittings shall be of the
recessed drainage type.
1103.1 Main Trap correct answers Leaders and storm drains connected to a combined sewer
shall be trapped. Individual storm water traps shall be installed on the storm water drain branch
serving each conductor, or a single trap shall be installed in the main storm drain just before its
connection with the combined building sewer or the public sewer
1103.2 Material correct answers Storm water traps shall be of the same materials as the piping
system to which they are attached
1103.3 Size correct answers Traps for individual conductors shall be the same size as the
horizontal drain to which they are connected
1103.4 Cleanout correct answers An accessible cleanout shall be installed on the building side of
the trap
1104.1 Prohibited Use correct answers Conductor pipes shall not be used as soil, waste, or vent
pipes, and soil, waste, or vent pipes shall not be used as conductors.
1104.2 Combining storm with sanitary drainage correct answers The sanitary and storm drainage
systems of a structure shall be entirely separate except where combined sewer systems are
utilized. Where a combined sewer is utilized, the building storm drain shall be connected to the
sanitary sewer exterior to the building.
1104.3 Floor Drains correct answers Floor drains shall not be connected to a storm drain
1105.1 Strainers correct answers Roof drains shall have strainers extended not less than 4 inches
(102mm) above the surface of the roof immediately adjacent to the roof drain. Strainers shall
have an available inlet area, above roof level, of not less than one and one-half times the area of
the conductor or leader to which the drain is connected
1105.2 Flat decks correct answers Roof drain strainers for use on sub decks, parking decks, and
similar areas that are normally serviced and maintained shall comply with Section 1105.1 or
1101.1 Scope correct answers The Provisions of this chapter shall govern the materials, design,
construction, and installation of storm drainage
1101.2 Where required correct answers All roofs, paved areas, yards, courts, and courtyards in
buildings shall drain into a separate storm sewer system or a combined sewer system or to an
approved place of disposal.
1101.3 Prohibited drainage correct answers Storm water shall not be drained into sewers
intended for sewage only
1101.4 Tests correct answers The conductors and the building storm drain shall be tested in
accordance with Section 312
1101.5 Change in size correct answers The size of a drainage pipe shall not be reduced in the
direction of flow
1101.6 Fittings and connections correct answers All connections and changes in direction of the
storm drainage system shall be made with approved drainage type fittings in accordance with
Table 706.3. The fittings shall not obstruct or retard flow in the system.
1101.7 Roof Design correct answers Roofs shall be designed for the maximum possible depth of
water that will pond there on as a determined by the relative levels of roof deck and overflow
weirs, scuppers, edges, or serviceable drains in combination with the deflected structural
elements. In determining the maximum possible depth of water, all primary roof drainage means
shall be assumed to be blocked
1101.8 Cleanouts required correct answers Cleanouts shall be installed in the storm drainage
system and shall comply with the provisions of this code for sanitary drainage pipe cleanouts
1101.9 Backwater valves correct answers Storm drainage systems shall be provided with
backwater valves as required for sanitary drainage systems in accordance with Section 715
1102.1 General correct answers The materials and methods utilized for the construction and
installation of storm drainage systems shall comply with this section and applicable provisions of
Chapter 7
1102.2 Inside storm drainage conductors correct answers Inside storm drainage conductors
installed above ground shall conform to on e of the standards listed in Table 702.2
1102.3 Underground building storm drain pipe correct answers Underground building storm
drain pipe shall conform to one of the standards listed in Table 702.2
1102.4 Building storm sewer pipe correct answers Building storm sewer pipe shall conform to
one o the standards listed in Table 1102.4 (Look at table on page 2 in notes)
, 1102.5 Subsoil drain pipe correct answers Subsoil drains shall be open-jointed, horizontally split
or perforated pipe conforming to one of the standards listed in Table 1102.5 (Table on page 3 in
notes)
1102.6 Roof Drains correct answers Roof drains shall conform to ASME A112.21.2 M or ASME
A112.3.1
1102.7 Fittings correct answers Pipe fittings shall be approved for installation with the piping
material installed, and shall conform to the respective pipe s standards or one of the standards
listed in Table 1102.7. The fittings shall not have ledges, shoulders, or reductions capable of
retarding or obstructing flow in the piping. Threaded drainage pipe fittings shall be of the
recessed drainage type.
1103.1 Main Trap correct answers Leaders and storm drains connected to a combined sewer
shall be trapped. Individual storm water traps shall be installed on the storm water drain branch
serving each conductor, or a single trap shall be installed in the main storm drain just before its
connection with the combined building sewer or the public sewer
1103.2 Material correct answers Storm water traps shall be of the same materials as the piping
system to which they are attached
1103.3 Size correct answers Traps for individual conductors shall be the same size as the
horizontal drain to which they are connected
1103.4 Cleanout correct answers An accessible cleanout shall be installed on the building side of
the trap
1104.1 Prohibited Use correct answers Conductor pipes shall not be used as soil, waste, or vent
pipes, and soil, waste, or vent pipes shall not be used as conductors.
1104.2 Combining storm with sanitary drainage correct answers The sanitary and storm drainage
systems of a structure shall be entirely separate except where combined sewer systems are
utilized. Where a combined sewer is utilized, the building storm drain shall be connected to the
sanitary sewer exterior to the building.
1104.3 Floor Drains correct answers Floor drains shall not be connected to a storm drain
1105.1 Strainers correct answers Roof drains shall have strainers extended not less than 4 inches
(102mm) above the surface of the roof immediately adjacent to the roof drain. Strainers shall
have an available inlet area, above roof level, of not less than one and one-half times the area of
the conductor or leader to which the drain is connected
1105.2 Flat decks correct answers Roof drain strainers for use on sub decks, parking decks, and
similar areas that are normally serviced and maintained shall comply with Section 1105.1 or
