MIL-HDBK-1191
by the local regulatory agencies shall be considered in the design. The
system shall be designed to avoid excessive back pressure and aspiration
effects. Adequate cleanouts shall be provided to permit access to all
sections of the waste drainage system. The cleanouts shall be located to
avoid or minimize disruption of medical functions. If a facility
sanitary waste requires lifting or pumping, provide duplex pumping
equipment and a backflow preventing check valve. This equipment shall be
connected to the alternative power source if one exists, or is included
in the project scope.
Protection of Special Fixtures and Equipment. Fixtures and
9.3.1
equipment used for sterilization, and food preparation, processing, or
storage, shall be protected from contamination by backflow of waste. An
indirect waste line, such as an air break or physical disconnection (open
drain) at the associated waste outlet, shall be incorporated into the
system design. These provisions also apply to equipment that cannot be
easily cleaned. Included are sterilizers, glass washers, refrigerators,
kitchen equipment, film X-ray processors, dental lab equipment (e.g.
boilout assembly tanks), and vacuum system separator tanks.
Special Drainage Equipment. Interceptors may be provided
9.3.2
when precious materials or heavy metals, such as silver and barium, are
sediment in the waste drainage from such spaces as a Cast Room, a
Prosthodontics Laboratory, barium procedure areas, film X-ray processing,
and spaces employing blood analyzers. Interceptors for barium waste
shall be aluminum. Flush rim floor drains shall be provided in Autopsy.
Garbage grinding disposers shall be provided in Kitchens on dishwashers,
pot and pan sinks, and other sinks as designated. Grease traps shall be
provided with grease-producing kitchen equipment including prewash sinks,
pot washers or sinks, and floor drains serving kettles. Separators shall
be provided in uses where petroleum products are subject to dripping or
spills, such as ambulance garages and mechanical equipment rooms.
Special Purpose Waste Lines. Separate waste lines shall be
9.3.3
provided for acid waste and radioactive waste from laboratories,
darkrooms and nuclear medicine treatment rooms, when justified by the
quantities and/or concentration of reagent expected to be introduced.
Acid-resistant waste piping will be utilized for such applications and,
if required, will pass through a neutralizing or dilution tank before
combining with building waste. If large quantities of acid or strong
base solutions are to be discharged into the waste system, neutralization
will be required. There are various radioactive materials to be found in
an MTF. The particular radioactive waste for a given facility shall be
identified. The appropriate prescribed manner of disposal in accordance
with federal and local safety standards shall be incorporated into the
design.
General-purpose Floor Drains. General floor drains shall be
9.3.4
considered for rooms in which water-using plumbing fixtures or equipment
are located. These include physical therapy rooms which are equipped
with hydrotherapy equipment, central sterile areas for sterilizers and
sanitizing washers, food service areas, wash-down and housekeeping
spaces, and mechanical equipment rooms which contain water-using
equipment. Provision of floor drains in toilets shall be at the
discretion of the using Military Department. Floor drains are normally
not required at emergency shower locations.
Trap Priming. The designer shall consider the need for trap
9.3.5
priming for all floor drains, particularly those in occupied spaces
required for infrequent leakage. A non-primed trap is a source of
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