In general, floor drains shall be cast iron body type with
Domestic cold and hot water distribution systems shall be
6-inch diameter nickel-bronze strainers for public toilets,
insulated per ASHRAE Standard 90.1 with vapor barrier
kitchen areas and other public areas. Receptors, open-site
for concealed and above ceiling piping, canvas jacketing
drains, hub drains, trench drains, and similar drains shall
and vapor barrier where exposed in mechanical areas, and
have dome bottom strainer (in addition to
vapor barrier with PVC jacketing where exposed in other
pedestrian/vehicle grate strainers where required) to
than mechanical areas.
reduce splashing, increase free area, and prevent debris
blockage. Drain body, frame and grate strainers shall be
Sanitary (Soil and Waste), and Vent System
rated for expected wheel loading, and shall include drain
Sanitary Pipe and Fittings. A complete sanitary building
adapters, extensions, receivers, deck clamps, and similar as
drainage system shall be provided for all plumbing
required by building construction. Drain strainer free area
fixtures, sanitary floor drains, kitchen equipment, and
shall be equal to or greater than the free area of the
equipment with sanitary, soil, or waste
calculated outlet pipe size area. Drain strainers in
drainage/discharge. The sanitary waste and vent system
pedestrian areas shall be heel-proof type. Every drain and
system opening shall have 1/4'' maximum strainer openings
shall be designed in compliance with applicable codes and
for rodent-proofing. Discharges shall be elastomeric pinch
standards. Piping shall be service weight cast iron soil
valves or similar for rodent-proofing. Receptor drains
pipe with hub and spigot fittings and joints with
outlets shall be two-times the area of combined inlet pipe
elastomeric gasket (by pipe manufacturer). Above ground
areas. Equipment room areas shall require large diameter
piping shall have hubless (no-hub) fittings and joints (by
cast iron strainers, and parking garages shall require large
pipe manufacturer) with pipe support compliant with
diameter tractor grates rated for expected wheel loading.
hubless (no-hub) pipe standard compliant with code
Drainage for ramps shall require either trench drains or
(generally within 12 inches of each side of each joint).
roadway inlets when exposed to rainfall. Trap primers
Vent Piping and Fittings. Piping shall be service weight
shall be provided for all sanitary drains (floor drains,
cast iron soil pipe with hub and spigot fittings and joints
receptors, open site drains, hub drains, and similar) where
with elastomeric gasket (by pipe manufacturer). Above
drainage is not routinely expected, or is seasonal.
ground piping shall have hubless (no-hub) fittings and
joints (by pipe manufacturer), or Type-K DWV copper
Sanitary Waste Equipment
with 95-5 tin antimony solder joints.
Sanitary Floor Drains. Sanitary floor drains shall be
oil, or grease laden waste; within 10 feet of the cooking
provided in multi-toilet fixture restrooms, kitchen areas,
battery, mop and service sinks in kitchen areas; and
mechanical equipment rooms, and locations where
as required by the state health department and local
interior floor drainage accumulates wastes. Single fixture
authorities, shall discharge to a grease interceptor prior
toilet rooms do not require floor drains.
to connecting into the sanitary sewer. Grease interceptors
162 F A C I L I T I E S S T A N D A R D S
FOR THE
PUBLIC
BUILDINGS
SERVICE
5.18 Plumbing Systems
Revised March 2005 PBS-P100
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