is an elevation mark on a vacuum breaker setting the
critical level minimum elevation the device can be installed
above the flood level rim of a fixture
is an actual or potential tie between potable water
cross-connection
and any source of pollution or contamination
A measurement of piping taken along the centerline
Developed Length
of pipe and fittings
Any pipe that conveys waste water in the drainage
drain
system
Is waste pipe that drains through an air gap to the
Indirect Waste
drainage system
A pipe installed to vent one fixture trap. It may
Individual vent connect to the vent system above the fixture or
terminate in the open air.
Is the primary or principal pipe to which branches
main
are connected
Is water that is sufficiently free of impurities to meet
potable water
public health standards
Parts of the plumbing system that are installed prior
Rough in
to the installation of fixtures.
Is drain pipe conveying sewage containing fecal
Soil Pipe
matter
The extension of a soil or waste stack above the
Stack Vent
highest fixture served
Is a device that provides a water seal to prevent the
trap passage of sewer gas and allow the passage of
waste
Trap seal distance from weir to top of the dip of the trap
is a backflow preventer that allows air to a vacuum
Vacuum Breaker
being pulled on a system
A vertical vent pipe to provide circulation of air to
vent stack
and from the drainage system
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