PLUMBING DESIGN MANUAL
FOR HOSPITAL PROJECTS
DEPARTMENT OF VETERANS AFFAIRS
January 2006
1.
CRITERIA UNIQUE TO VA
1.1
Plumbing design and plumbing seismic design shall only be
indicated on "PL-Series" drawings (see VA Design and Construction
Procedures, "Drawings").
1.2
Piping shall be shown on the same plan as the fixtures being
served. This does not apply for interstitial areas.
1.3
Pipe size shall be indicated on both floor plan and riser diagram.
1.4
Most VA plumbing fixture units are less than that indicated in
standard plumbing codes (see Article, PLUMBING FIXTURE SCHEDULES).
1.5
If reagent grade water equipment (reverse osmosis and/or
deionization) is required, it is provided by the medical center
and is not in this contract (see Article, REAGENT GRADE WATER
SYSTEM).
1.6
The following shall be indicated on the plumbing drawings:
A.
Drainage area in square meters for each roof drain and totals
for building at outside building wall.
B.
Fixture unit count at base of each soil and waste stack and
for each sanitary sewer at outside building wall.
C.
Invert elevations for all sewers at outside building wall.
D.
Centerline elevation for all pressure systems at outside
building wall.
E.
Floor elevation at each level.
1.7
Floor drains shall not be installed in individual toilet rooms
with water closets. Provide in public toilet rooms containing two
or more water closets or a combination of one water closet and one
urinal
1.8
Liquid ring air compressors and vacuum pumps shall not be
installed at sites subject to droughts. All sites in California
are in this category. Water quality requirements are indicated in
Master Specification 15491.
1.9
Sub-soil drainage is a plumbing item and shall be indicated on
architectural and plumbing drawings.
1.10
Investigate if credit can be obtained from the public utility
company for water consumed, but not discharged into the sanitary
sewerage system. If so, and adequate pressure is available,
provide meters for these users. Examples of users are the
irrigation system, cooling towers, boiler make-up, and liquid ring
compressors and vacuum pumps.
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