UPC CHAPTER 9 VENT TERMINATION

drops or sags

905.0 Vent Pipe Grades and Connections.

905.1 Grade. Vent and branch vent pipes shall be free from

__________________, and each such vent shall be level or shall be so

graded and connected as to drip back by gravity to the drainage pipe it serves.

invert taken off

905.2 Horizontal Drainage Pipe. Where vents connect to

a horizontal drainage pipe, each vent pipe shall have its_______________ above the drainage centerline of such pipe down-

stream of the trap being served.

6 inches (152 mm)

905.3 Vent Pipe Rise. Unless prohibited by structural conditions, each vent shall rise vertically to a point not less than

___________________ above the floo level rim of the fixture served before offsetting horizontally, and where two or more vent pipes converge, each such vent pipe shall rise to a point not less than 6 inches (152 mm) in height above the flood-

level rim of the plumbing fixture it serves before being con-

nected to any other vent.

drainage fittings

Vents less than 6 inches (152 mm) above the flood-level rim of the fixture shall be installed with

approved ______________, material, and grade to the drain.

undiminished

905.4 Roof Termination. Vent pipes shall extend ________________ in size above the roof, or shall be reconnected with

soil or waste vent of the proper size.

below the weir of the trap

905.5 Location of Opening. The vent pipe opening from

soil or waste pipe shall not be _________________.

Exception: Water closets and similar fixtures.

wastes separately into an approved double fitting having inlet openings at the same level

905.6 Common Vertical Pipe. Two fixtures shall be permitted to be served by a common vertical pipe where each such fixture _________________________________________________.

above the ro

906.0 Vent Termination.

906.1 Roof Termination. Each vent pipe or stack shall extend through its flashing and shall terminate vertically not

less than 6 inches (152 mm) ___________ of nor less than 1

foot (305 mm) from a vertical surface.

synthetic latex paints

ABS and PVC piping

exposed to sunlight shall be protected by water based

10 feet (3048 mm)

3 feet (914 mm)

3 feet (914 mm)

906.2 Clearance. Each vent shall terminate not less than

___________ from, or not less than _______________ above, an openable window, door, opening, air intake, or vent shaft, or not less than ____________ in every direction from

a lot line, alley and street excepted.

6 inches (152

mm)

906.3 Use of Roof. Vent pipes shall be extended separately

or combined, of full required size, not less than_______________ above the roof or firewall.

Flagpoling

______________ of vents shall be

prohibited except where the roof is used for assembly pur-

poses or parking. Vents within 10 feet (3048 mm) of a part of

the roof that is used for assembly purposes or parking shall

extend not less than 7 feet (2134 mm) above such roof and

shall securely stay.

10 feet (3048 mm)

906.4 Outdoor Installations. Vent pipes for outdoor

installations shall extend not less than _______________________________

above the surrounding ground and shall be securely sup-

ported.

flashings or flashing

906.5 Joints. Joints at the roof around vent pipes shall be

made watertight by the use of approved ____________

material.

4 pounds per square foot(lb/ft2) (19 kg/m2) or 1/16 of an inch (1.6 mm) thick.

906.6 Lead. (See Chapter 17) Sheet lead shall comply with

the following:

(1) For safe pans - not less than ________________________

3 lb/ft2 (15 kg/m2)

(2) For flashings or vent terminals- not less than ____________ or 0.0472 of an inch (1.2 mm) thick.

1/8 of an inch (3.2 mm)

(3) Lead bends and lead traps shall be not less than ________________ in wall thickness.

907.0 Vent Stacks and Relief Vents.

907.1 Drainage Stack. Each drainage stack that extends 10

or more stories shall be served by a parallel vent stack, which

shall extend undiminished in size from its upper terminal and

connect to the drainage stack at or immediately below the

lowest fixture drain. Each such vent stack shall also be con-

nected to the drainage stack at each fifth floor, counting down

from the uppermost fixture drain, using a yoke vent, the size

of which shall be not less in diameter than either the drainage

or the vent stack, whichever is smaller.

42 inches (1067 mm)

907.2 Yoke Vent. The yoke vent connection to the vent stack

shall be placed not less than ________________above the

floor level, and the yoke vent connection to the drainage stack

shall be using a wye-branch fitting placed below the lowest

drainage branch connection serving that floor.

vertical drainage

four fixtures

908.0 Wet Venting.

908.1 Vertical Wet Venting. Wet venting is limited to ____________ piping receiving the discharge from the trap arm of one and two fixture unit fixtures that also serves as a vent not exceeding _______.

6 feet (1829 mm)

Wet-vented fixtures shall be

within the same story; provided, further, that fixtures with a

continuous vent discharging into a wet vent shall be within

the same story as the wet-vented fixtures. No wet vent shall

exceed ______________ in developed length.

wet-vented section

908.1.1 Size. The vertical piping between two consecutive inlet levels shall be considered a ________________. Each wet-vented section shall be not less than one

pipe size exceeding the required minimum waste pipe size of the upper fixture or shall be one pipe size exceeding the required minimum pipe size for the sum of the fixture units served by such wet-vented section, whichever is larger, but in no case less than 2 inches (50 mm) in diameter.

smaller than the minimum vent pipe size

908.1.2 Vent Connection. Common vent sizing shall be the sum of the fixture units served but, in no case, _________________________________ required for a fixture served, or by Section

904.0.

shall be permitted to be vented by a horizontal wet vent

908.2 Horizontal Wet Venting for a Bathroom Group. A bathroom group located on the same floor level __________________ where all of the conditions of Section 908.2.1 through Section 908.2.5 are met.

bidet, shower, or bathtub

908.2.1 Vent Connection. The dry vent connection to the wet vent shall be an individual vent for the ______________. One or two vented lavatory(s) shall be permitted to serve as a wet vent for a bathroom group.

wet-vented fixture drain or trap arm

Only one ____________________________ shall discharge upstream of the dry-vented fixture drain connection. Dry vent connections to the horizontal wet vent shall be in accordance with Section 905.2 and Section

2 inches (50 mm)

3 inches (80 mm)

905.3.

908.2.2 Size. The wet vent shall be sized based on the fixture unit discharge into the wet vent. The wet vent shall be not less than _____________ in diameter for 4

drainage fixture units (dfu) or less, and not less than _______________in diameter for 5 dfu or more. The dry vent shall be sized in accordance with Table 702.1 and Table 703.2 based on the total fixture units discharging into the wet vent.

below the weir of the trap.

908.2.3 Trap Arm. The length of the trap arm shall not exceed the limits in Table 1002.2. The trap size shall be in accordance with Section 1003.3.

The vent pipe opening from the horizontal wet vent, except for water clos-

ets and similar fixtures, shall not be ______________.

downstream of fixture drain

908.2.4 Water Closet. The water closet fixture drain or trap arm connection to the wet vent shall be _____________ or trap arm connections to the horizontal wet vent.

bathroom group

908.2.5 Additional Fixtures. Additional fixtures shall discharge downstream of the wet vent system and be conventionally vented.

Only the fixtures within the _________________________ shall connect to the weT vented horizontal branch.

1/4 inch per foot (20.8 mm/m)

Drainage fittings shall be used on the vent below the floor level, and a slope of not less than_____________back to the drain shall be maintained.

45 degree (0.79 rad)

90 degree (1.57 rad)

45 degree (0.79 rad)

The return bend used under the drainboard shall be a one-piece

fitting or an assembly of a ________________, a _________________, and a __________________ elbow in the order named. Pipe sizing shall be as elsewhere required in this code. The island sink drain, upstream of the returned vent, shall serve no other fixtures. An accessible cleanout shall be installed in the vertical portion of the foot vent.

vent or vents

910.3 Vents. Each combination waste and vent system, as

defined in Chapter 2, shall be provided with a ________________

adequate to ensure free circulation of air.

15 feet (4572 mm)

A branch exceeding_______________ in length shall be separately vented in an approved manner.

one-half the inside cross-sectional area

The area of a vent installed in a combination waste and vent system shall be not less than ____________________ of the drainpipe served. The vent connection shall be downstream of the uppermost fixture.

910.4 Connections and Size. Branches serving traps

shall connect to the main line at an angle not exceeding 2 per-

cent. Each waste pipe and each trap in such a system shall be

not less than two pipe sizes exceeding the sizes required by

two pipe sizes

Chapter 7 of this code, and not less than _______________exceeding a fixture tailpiece or connection.

2 feet (610 mm)

910.5 Vertical Waste Pipe. No vertical waste pipe shall be used in such a system, except the tailpiece or connection between the outlet of a plumbing fixture and the trap. Such tailpieces or connections shall be as short as possible, and in no case shall exceed .________________

45 degree (0.79 rad)

Exception: Branch lines shall be permitted to have _______________vertical offsets.

trap

910.6 Cleanouts. An accessible cleanout shall be installed in each vent for the combination waste and vent system. Cleanouts shall not be required on a wet-vented branch serving a single trap where the fixture tailpiece or connection is

not less than 2 inches (50 mm) in diameter and provides ready

accessible for cleaning through the ______.

eight floor outlet

911.1 Circuit Vent Permitted. A maximum of ______________water closets, showers, bathtubs, or floor drains connected to a horizontal branch shall be permitted to be circuit

vented.

downstream trap arm

upstream trap arm connection

Each trap arm shall connect horizontally to the horizontal branch being circuit vented in accordance with Table

1002.2. The horizontal branch shall be classified as a drain

and a vent from the most _________________ connection to the most ________________ to the horizontal

branch.

2 inches (50mm)

Circuit Vent shall not be less than?

circuit-vented

911.3 Relief Vent. A 2 inch (50 mm) relief vent shall be pro-

vided for ______________ horizontal branches receiving the discharge of four or more water closets when connecting to a drainage stack that receives the discharge of soil or waste from upper horizontal branches.

between the stack and the most downstream trap arm of the circuit vent

911.3.1 Connection and Installation. The relief vent

shall connect to the horizontal branch______________________.

The relief vent shall be installed on the vertical to the

horizontal branch.

4 fixture units

911.3.2 Fixture Drain. The relief vent is permitted to serve as a fixture drain. Fixtures discharging to a relief vent shall be one or two fixture unit fixtures but shall not exceed a total of ______________.

1 inch per foot (83.3 mm/m)

911.4 Slope and Size of Horizontal Branch. The vented

section of the horizontal branch shall be uniformly sloped and not more than _____________. The entire length of the vented section of the horizontal branch shall be sized or the total drainage discharge to the branch according to Table 703.2.

connected together

911.4.1 Multiple Circuit-Vented Branches. Circuit- vented horizontal branches are permitted to be_____________. Each group of a maximum of eight fixtures

shall be considered a separate circuit vent and shall be in

accordance with Section 911.4.1.1 and Section 911.4.1.2.

sized independently

911.4.1.1 Size of Parallel Horizontal

Branches. Parallel horizontal circuit vented branches shall be permitted to connect on the same floor level. Each separate circuit-vented horizontal branch that is interconnected shall be ______________ in accordance with Section 911.4.

uniformly sized

911.4.1.2 Size of Continuous Horizontal Branches. Two or more circuit vented systems

continuous on the same horizontal branch shall be

_______________ for the total discharge into the branch.

located on the same floor

911.5 Additional Fixtures. Fixtures, other than the circuit-vented fixtures, are permitted to discharge to the horizontal branch drain. Such fixtures shall be ___________________.