7.4
Provide combination shut-off and balancing valves in the hot water
return circulating lines.
8.
DRINKING WATER EQUIPMENT
Provide wall hung, self-contained, electric, wheelchair accessible,
water coolers.
9.
SANITARY AND STORM DRAINAGE SYSTEMS
9.1
See Article, PLUMBING FIXTURE SCHEDULES, for fixture units and
waste/vent minimum fixture branch sizes.
9.2
Provide an adequate number of sanitary and storm connections from
a building. Design each sanitary sewer connection not to exceed
300 mm (12 inches) diameter, and provide at least two connections
from each building [exception: one sewer is adequate for a
building that can be served by a 150 mm (6 inch) or less diameter
pipe]. Maximum allowable size for storm drain is 375 mm (15
inches). Base storm frequency on local code.
9.3
Do not drain outside building sub-soil drain tile to an interior
sump pump. If a pump is required, locate it outside of the
building.
9.4
Provide chemical-resistant pipe for all waste and vent piping
serving laboratory fixtures and photographic developing equipment.
Chemical drainage shall pass through an acid neutralizing tank
before connecting to the building sanitary drainage system.
Install chemical-resistant vent pipe independently through the
roof.
9.5
Where reduced pressure backflow preventers are required (Master
Specification 15400), provide positive drainage.
10.
INTERIOR FUEL GAS SYSTEM
Design in accordance with NFPA 54.
11.
MEDICAL GAS AND VACUUM SYSTEMS
11.1
Design oxygen, medical compressed air, medical vacuum, nitrous
oxide, and nitrogen systems in accordance with current editions of
NFPA 50 and 99, Compressed Gas Association Standards, Master
Specification 15491, and the following:
11.2
During early stages of the project, perform the following:
A.
Test water or obtain analysis from the medical center to
determine if additional water treatment is required for liquid
ring equipment. If so, describe additional requirements in the
specifications. Suitable water quality for no treatment is:
pH - 7.0 minimum
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