Vacuum Pumps and Turbines
Sterilizers
Base and Vibration Isolators
Pumps
4.
PLUMBING FIXTURES
4.1
Plumbing fixture numbers, description, fixture units and minimum
branch sizes are indicated in Article, PLUMBING FIXTURE SCHEDULES.
4.2
Plumbing fixtures shall be located where indicated by VA Program
Guide 7610 (Equipment Guide List).
5.
WATER DISTRIBUTION SYSTEMS
5.1
See Article, PLUMBING FIXTURE SCHEDULES, for fixture units and
minimum fixture branch sizes.
5.2
Size the piping for the hot and cold water systems not to exceed
the maximum velocity allowed by the National Standard Plumbing
Code. Provide necessary water hammer arrestors.
5.3
Provide wall hydrants a maximum of 60 m (200 feet) apart, at
loading docks and at building entrances, with a minimum of one
wall hydrant on each exterior wall.
5.4
Maintain a minimum of 240 kPa (35 psi) at top floor ceiling.
5.5
Coordinate electrical supply to electronic faucets and flush
valves.
6.
DOMESTIC WATER BOOSTER SYSTEM
Use a two pump system. Size each pump for 75 percent of the total water
demand. Pumps shall alternate. When the demand exceeds the capacity of
one pump, both pumps shall operate. Provide a pneumatic tank and "NO-
FLOW" shut-down controls. Provide emergency power.
7.
DOMESTIC HOT WATER SYSTEMS
7.1
Provide simplex shell and steam coil electrical or gas central
heater with the capacity of generating the flow demand at 60
degrees C (140 degrees F). However, heater discharge shall be 54
degrees C (130 degrees F). Consider Legionnaires disease, energy
consumption and initial cost when selecting a circulating system.
7.2
Size heater based on modified Hunter's Curve (Hot and Cold Water
Section, ASHRAE GUIDE AND DATA BOOK) and fixture unit count
indicated in Article, PLUMBING FIXTURE SCHEDULES. Special
equipment demands such as sterilizers, and laboratory glass
washers must be added to the water heater load.
7.3
Size the hot water supply and return lines by the heat loss method
as outlined in the ASHRAE GUIDE AND DATA BOOK, not to exceed 6
degrees C (10 degrees F) heat loss. Dead ends shall be limited to
6 m (20 feet).
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