does consist of four basic functional elements which
are defined as follows:
A sanitary drain
(2) Sanitary drain.
receives the discharge of sanitary and domestic
a. House Sewer. The house sewer is that part
wastes only.
of the waste plumbing system beginning just outside
the foundation and terminating at a street sewerage
(3) Storm drain. As shown at the right of
branch or a septic tank. A typical house sewer is
figure 3-11, a storm drain receives storm, clear water,
shown in section in figure 3-11.
or surface-water wastes only.
b. House Drain. The house drain is that part
(4) Industrial drain. An industrial drain
of the waste system which receives the discharge of
receives liquid waste from industrial equipment or
all soil and waste stacks within the building. It may
processes and consequently receives little attention in
be installed underground or suspended from the first-
theater of operations construction.
floor joists. The house drain system is also referred
to as the "collection lines" and includes such
c. Soil Pipe. Soil pipe is that portion of the
appliances as house traps, back-flow valves,
plumbing system which receives the discharge of
cleanouts, and area drains. In general, house drains
water closets and conveys those wastes to the house
will fall into one of four classes on any set of specific
drain.
building plans.
d. Waste Pipe. Waste pipe is that part of the
(1) Combination system. As shown at the
drainage system which conveys the discharge of
left on figure 3-11, a combination system receives the
fixtures other than water closets such as sinks,
discharge of the sanitary wastes of the building plus
lavatories, urinals, bathtubs, and similar fixtures to
the storm water from the roof and other exterior
the soil pipe.
sources.
REVIEW QUESTION 3
Items such as sinks, shower stalls, and water closets are referred to as plumbing fixtures. How are
plumbing fixtures most often represented on plumbing plans? (para 3-6, d)
REVIEW QUESTION 4
Utility plans will generally be augmented by additional detail drawings. How are features on a utility plan
view referenced when they are to be more fully explained on a standard details drawing? (para 3-7)
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