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AWWA SOURCES66401
- Assessing Urinal Performance and Efficiency Opportunities: Seattle Field Survey and Testing Results
- Conference Proceeding by American Water Works Association, 02/01/2008
- Publisher: AWWA
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This powerpoint presentation begins by providing information on the Saving Water Partnership that is guided by the Conservation PotentialAssessment (CPA), an analysis tool providing life-cycle cost evaluation ofthe conservation potential for specific, and/or in combination with agroup of measures. Research goals include:to inventory a representative sample of urinals in the joint servicearea to determine the distribution of the most common fixtures, age,condition, and other relevant characteristics;to examine the baseline performance characteristics of the existingurinal stock; and,to assess practicality and cost-effectiveness of alternative strategies tosignificantly reduce water consumption and maintain flusheffectiveness in urinal fixtures found throughout the SWP. Application of research results include:designing a cost-effective urinal efficiencyprogram to upgrade existing urinals;better estimating savings potential and actualcost; and,refine previous estimates of regional savings potential for urinalupgrades. Research objectives include:determining baseline characteristics of the current stock of urinals bycollecting type, age, condition and other important performance data;determining urinal flush volume and flush effectiveness through fieldmeasurements;interview commercial customers to identify maintenance practices,urinal performance history, and decision makers for a urinal retrofitprogram; and,assess the practicality and cost-effectiveness of alternative strategiesto reduce flush volume and maintain flush effectiveness. Observations include:maintenance staff use stop valves to minimize actual flushvolume, many older urinals already operate at low flush volume;old urinals with single filter diaphragms flush at less thannominal flush volume even with the stop valve fully open;dual filter diaphragms provide better immediate savings and moreconsistent long term savings;urinal use is >100/day in public buildings and 11-50/day inprivate buildings; and,most facilities are interested in a urinal retrofit. Includes tables, figures.
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