15.Building Trap
17.Combined Fixture
A combination kitchen and laundry sink in a single unit, with both deep and shallow bowls side by side. An
institutional or prison fixture.
18.Combined Building Sewer
A combined building sewer is a type of drain system that uses a single drain system to carry water drainage
and sanitary waste away from a building.
This type of sewer design is no longer used in building new
communities (because current design separates sanitary sewers from runoff), but many older cities
continue to operate combined sewers.
19.Common Vent
Building drain system vertical vent which connects two or more fixture branches on the same level. Dual
vent, common vent, unit vent. In plumbing, a single vent, 1 connected at the junction of two fixture drains,
which serves as a vent for both.
20.Continuous Vent
A continuous vent is a vent which extends from a vertical soil or waste pipe and can serve one or multiple
fixtures located on the same story. Continuous vents, like all plumbing vents, protect the trap seal(s) of the
fixtures they serve.
21.Continuous Waste
A drain from two or more plumbing fixtures connected to a single trap. There are two types of continuous
waste: plastic and brass.

22.Cross Connection


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- Fall '15