Flexible Air Connector A conduit for transferring air between an air
__- __- __-__- __- __- __- __- __- __- __- __- __-
duct or plenum and an air terminal unit, an air inlet or an air outlet
__- __- __- __- __- __- __- __- __- __- __- __- __- __-
- Such conduit is limited in its use, length in its use, length and location
__- __- __- __- __- __- __- __- __- __- __- __- __- __-
Flue Collar The portion of a fuel-burning appliance designed for the
__- __-__- __- __- __- __- __- __- __- __- __- __-
attachment of a draft hood, vent connector or venting system
__- __- __- __- __- __- __- __- __-
Stack Any main vertical DWV line that extends one or more stories
__-__- __- __- __- __- __- __- __- __- __- __- __- __-
to its vent terminal
__- __- __-
Stack Bond A brickwork or masonry bond having successive courses
__- __-__- __- __- __- __- __- __- __- __- __-
of stretchers with all head joints aligned vertically.
__- __- __- __- __- __- __-
Stack Vent The extension of soil or waste stack above the highest
__- __-__- __- __- __- __- __- __- __- __- __- __- __-
horizontal drain connected __- __-
Gross Area of Exterior Walls
__- The normal projection of all exterior
__- __- __- __-__- __- __- __- __- __- __- __-
walls, including the area of all windows and doors installed therein
__- __- __- __- __- __- __- __- __- __-
Air admittance valve
__- A one-way valve designed to allow air into the
__- __-__- __- __- __- __- __- __- __- __- __- __-
plumbing drainage system where a negative pressure develops in the piping.
__- __- __- __- __- __- __- __- __- __-
,Air circulation, forced
__- A means of providing space conditioning
__- __-__- __- __- __- __- __- __- __-
utilizing movement of air through ducts or plenums by mechanical means
__- __- __- __- __- __- __- __- __- __-
Air-conditioning system A system that consists of heat exchangers,
__- __-__- __- __- __- __- __- __- __- __-
blowers, filters, supply, exhaust and return-air systems
__- __- __- __- __- __-
Air-impermeable insulation __- __-__- An insulation having an air permanence
__- __- __- __- __- __- __-
equal to or less than 0.02
__- __- __- __- __-
Antisiphon A term applied to valves or mechanical devices that
__-__- __- __- __- __- __- __- __- __- __- __-
eliminate siphonage. __-
Backflow __-__- __- the flow of water or other liquids, mixtures or substances
__- __- __- __- __- __- __- __- __-
into the distributing pipes of a potable supply of water from any source
__- __- __- __- __- __- __- __- __- __- __- __- __-
other than from its intended source.
__- __- __- __- __-
Backflow preventer __- __-__- __- Prevents backflow into the potable water supply
__- __- __- __- __- __-
Backsiphonage The flowing back of used or contaminated water from
__-__- __- __- __- __- __- __- __- __- __- __-
piping into a potable water-supply pipe due to a negative pressure in such
__- __- __- __- __- __- __- __- __- __- __- __- __-
pipe
Boiler A self-contained appliance from which hot water is circulated
__-__- __- __- __- __- __- __- __- __- __- __-
for heating purposes and then returned to the boiler
__- __- __- __- __- __- __- __-
- Water temps not exceeding 250 degrees F
__- __- __- __- __- __- __-
, Braced wall line A straight line through the building plan that
__- __- __-__- __- __- __- __- __- __- __- __- __-
represents the location of the lateral resistance provided by the wall
__- __- __- __- __- __- __- __- __- __- __-
bracing
Branch __-__- __- Any part of the piping system other than a riser, main or
__- __- __- __- __- __- __- __- __- __- __- __-
stack
Branch, main A water-distribution pipe that extends horizontally off a
__- __-__- __- __- __- __- __- __- __- __- __-
main or riser to convey water to branches or fixture groups
__- __- __- __- __- __- __- __- __- __-
Branch, vent A vent connecting two or more individual vents with a
__- __-__- __- __- __- __- __- __- __- __- __- __- __-
vent stack or stack vent
__- __- __- __-
BTU/H The listed maximum capacity of an appliance, absorption unit
__-__- __- __- __- __- __- __- __- __- __- __-
or burner expressed in British thermal units input per hour
__- __- __- __- __- __- __- __- __-
Building drain The lowest piping that collects the discharge from all
__- __-__- __- __- __- __- __- __- __- __- __- __-
other drainage piping and extends 30 inches beyond the exterior walls and
__- __- __- __- __- __- __- __- __- __- __- __-
conveys the drainage to the sewer
__- __- __- __- __-
Built-up roof covering Two or more layers of felt cemented together
__- __- __-__- __- __- __- __- __- __- __- __- __-
and surfaced with a cap sheet
__- __- __- __- __-
Chimney A primary vertical structure containing one or more flues,
__-__- __- __- __- __- __- __- __- __- __- __-
for the purpose of carrying gaseous products of combustion and air from
__- __- __- __- __- __- __- __- __- __- __- __-
a fuel-burning appliance to the outside
__- __- __- __- __-
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