MIL-HDBK-1165
sewer line. This prevents odors from permeating to the air
above. Also, the urinal bowl is usually coated with a water and
urine repellent material that prevents bacterial growth and
odors. The trap is removed and replaced periodically.
Manufacturers' claims indicate that the waterless urinals have
substantially lower operating costs than flush type urinals, as
well as increased water and sewage savings.
The waterless urinal is an approved fixture in the 1996
National Standard Plumbing Code and complies with ANSI Z124.9-94.
They are also very cost effective for new construction projects
since water supply and flush valves are not needed.
Care does
need to be taken however to prevent the waterless urinals from
becoming scratched, as scratches will damage the urine-resistant
coating that can cause urine to "stick" and dry on the urinal's
surface.
5.2.2.2
Operation and Maintenance Procedures.
Listed below
are some maintenance procedures that will conserve water in
conventional urinals:
a)
Locate and repair leaks.
b) Replace small parts, if practical to do so. Siphon
jet urinals, for example, use rubber diaphragms that should be
replaced periodically.
5.2.2.3
Retrofits. Listed below are some suggestions for urinal
retrofitting:
a) Flushometer valves - fit conventional urinals with
water-reducing parts.
b) Timers - install on urinals that have constant
water flow to turn the water off during no-occupancy hours.
c) Sensors - install to automatically flush after
urinal is used, preventing the user from over-flushing.
5.2.2.4
Replacements. The 1.0 gpf (3.9 lpf) urinals come in
the types listed above and are available from a multitude of
vendors. Waterless urinals (described above) are also available.
5.2.2.5
Problems and Pitfalls. Fewer difficulties should
result from retrofitting or replacing urinals than from toilets
because of the less complex nature of the waste. However, you
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