–is the minimum cross-sectional area at the point
of water supply discharge measured or expressed in terms of: ( 1) diameter of
a circle; (2) if the opening is not circular, the diameter of a circle of
equivalent cross-sectional area. (This is applicable also to air gap
installation.)
EFFECTIVE OPENING
the on-going installation of the plumbing system or
any part thereof which has been installed prior to the effectivity of this Code.
EXISTING WORK
one person living alone or a group Jiving together, whether related to each other by birth or not.
FAMILY
a valve located at the end of a water pipe through of which water
can be drawn from or held within the pipe .
FAUCET
a metallic sleeve, caulked or joined to an opening in a pipe,
into which a plug is screwed that can be removed for cleaning or examining
the interior of the pipe.
FERRULE
FIXTURE
the water supply pipe between the fixture supply pipe and the water-distributing pipe .
FIXTURE BRANCH
the drainpipe from the trap of a fixture to the junction
of that drain with any other drainpipe.
FlXTURE DRAIN
a water supply pipe connecting the fixture with the
fh.ture branch.
FIXTURE SUPPLY
is an arbitrary quantity in terms of which the loadproducing efTects or water requirements on the plumbing system of different
kinds of plumbing fixtures are cxpres~cd in some arbitrarily chosen scale.
One fixture unit is equivalent to a rate of flow at 28.3 liters per minute ( l cu.
ft./minute).
FIXTURE UNIT
the level in a fixture at which water begins to overflow
ovc:r the top or rim of the fixture.
FLOOD LEVEL
Is the top edge of a receptacle from where water
overflows.
FLOOD LEVEL RIM
FLOODED
the area included within surrounding walls of a building
(or portion thc1eof), exclusive of vent shafts and courts.
FLOOR AREA
FLUSH TANK
is a device located at the bottom of the tank for the
purpose of flushing waster closet and similar fixtures.
FLUSH VALVE
FLUSHOMETER TANK
is a device, which discharges a predetennined
quantity of water into fixtures for flushing purposes and is actuated by direct .
water pressure.
FLUSHOMETER VALVE
GATE VALVE
a valve in which the flow of fluid is cut off by means of
a circular disc that fits over and against the horizontal valve seat. The
movement of the plane of disc is parallel to the nonnal direction of flow of
water through the orifice resulting to a tortuous passage which offers a high.
pressure loss.
GWBE VALVE
a return bend of small-sized pipe, one end of which is
about 30 em. long and the other end is about 7. 5 em. long. It is commonly
used as a faucet for a pantry sink. Also, the term means the flexible tubing
connection between a service pipe and a water main.
GOOSENECK
is the slope or fall of a line of pipe with reference to a horizontal
plane. In drainage, it is usually expressed as the fall in centiEleters per
meter or percentage slope of pipe.
GRADE
an interceptor of at least 3 c.ubic meters
capacity to serve one or more fixtures and which is remotely located.
GREASE INTERCEPTOR
a device designed to retain grease from one to a maximum of tour fixtures .
GREASE TRAP