CHAP 2 U-Z Flashcards
a room space having a volume equal to at least
1.4 c.u. m. of the aggregate input rating of the fuel-burning appliance
installed in that space. Rooms adjacent and open to the space where the
appliance is installed, through openings not furnished with doors, are
considered a part of the unconfined space .
UNCONFINED SPACE
an arrangement of venting so installed that one vent pipe will serve two (2) traps.
UNIT VENT
an air pressure less than atmospheric. Also, implies siphonage in piping system.
VACUUM
sec Backtlow Prevcnter
VACUUM BREAKER
a pipe or opening used for ensuring the circulation of air in a
plumbing system and for relieving the negative pressure exerted on trap
seals.
VENT PIPE
the vertical vent pipe installed primarily for providing
circulation of air to and from any part of the soil, waste of the drainage
system.
VENT STACK
- pipes installed to provide flow of air to or from a
drainage system or to provide a circulation of air within such system to
protect traps seals from siphonage and back pressure.
VENT SYSTEM
any pipe cr fitting installed in a vertical position or
which forms an angle of not more than forty-five (45) degrees with the
vertical line.
VERTICAL PIPE
see Liquid Waste and Industrial Waste.
WASTE
:1 pipe, which conveys only wastewater or liquid wa te,
free of fel~al matter.
WASTE PlPE
a device which conditions cr treats water
supply to improve water quality, remove suspended solids by filtration.
WATER TREATMENT
a pipe which conveys potable water
from the building supply pipe to the plumbing fixtures and other water
outlets.
WATER- DISTRIBUTING PlPE
- or street main is the water-supply pipe for public or
community use.
WATER MAIN
- of a building or premises consists of the
water service pipe, water supply line, water distributing pipe and the
necessary branch pipes, fittings, valves and all appurtenances required for
the supply of potablt! water.
WATER SUPPLY SYSTEM
· that portion of a vent pipe through where wastewater also
fl ows through.
WET VENT
-any joint or seam obtained by the joining
of metal parts in a plastic molren state.
WELDED JOINT OR Sf:AM
a person who specializes in the welding of pipes
and holds a valid certificate of competency from a recognized testing
agency, based on the requirements of the regulating authority.
WELDER, PIPELINE-
a hose connection with tw ~gated outlets permitting two
connections of the same or smaller coupling diameter to be taken from a
single supply line. Also, a pipe fitting of three branches that form the letter “wye”.
WYE
- an open. unoccupied space, other than a court, unobstructed from
the ground to the sky, except where specifically provided in this Code.
YARD
- a pipe connecting upward from a soil or waste stack below
the floor and below horizontal connection to an adjacent vent stack at a
point above the tloor and higher than highest spill level of fixtures for
preventing pressure changes in the stacks.
YOKE VENT -
