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// CODE SNIPPET

1503.8 Procedure for Estimating Gray Water Discharge

Uniform Plumbing Code 2018 of Nevada > 15 Alternate Water Sources for Nonpotable Applications > 1503.0 Gray Water Systems > 1503.8 Procedure for Estimating Gray Water Discharge
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Gray water systems shall be designed to distribute the total amount of estimated gray water on a daily basis. The water discharge for gray water systems shall be determined in accordance with Section 1503.8.1 or Section 1503.8.2.

1503.8.1 Single Family Dwellings and Multi-Family Dwellings

The gray water discharge for single family and multi-family dwellings shall be calculated by water use records, calculations of local daily per person interior water use, or the following procedure:
  1. The number of occupants of each dwelling unit shall be calculated as follows:
    First Bedroom 2 occupants
    Each additional bedroom 1 occupant
  2. The estimated gray water flows of each occupant shall be calculated as follows:
    Showers, bathtubs, and lavatories 25 gallons (95 L) per day/occupant
    Laundry 15 gallons (57L) per day/occupant
  3. The total number of occupants shall be multiplied by the applicable estimated gray water discharge as provided above and the type of fixtures connected to the gray water system.

1503.8.2 Commercial, Industrial, and Institutional Occupancies

The gray water discharge for commercial, industrial, and institutional occupancies shall be calculated by utilizing the procedure in Section 1503.8.1, water use records or other documentation to estimate gray water discharge.

Related Code Sections


1503.8 Alternate Water Sources for Nonpotable Applications, Procedure for Estimating Gray Water Discharge
Gray water systems shall be designed to distribute the total amount of estimated gray water on a daily basis. The water discharge for gray water ...
Uniform Plumbing Code 2018 of Nevada > 15 Alternate Water Sources for Nonpotable Applications > 1503.0 Gray Water Systems > 1503.8 Procedure for Estimating Gray Water Discharge
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, bathtubs and lavatories and 15 gallons per day (56.7 lpd) per occupant for clothes washers or laundry trays. C = Estimated gray water ...
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trays. C = Estimated gray-water discharge based on the total number of occupants ...
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1504.5.5 Alternate Water Sources for Nonpotable Applications, Number of Emitters
NUMBER OF EMITTERS PER GALLON OF ESTIMATED GRAY WATER DISCHARGE PER DAY* (gallons per day) Sand 1.8 0.6 Sandy loam 1.4 0.7 ...
Uniform Plumbing Code 2018 of Nevada > 15 Alternate Water Sources for Nonpotable Applications > 1504.0 Subsurface Irrigation System Zones > 1504.5 Subsurface and Subsoil Irrigation Field Design and Construction > 1504.5.5 Number of Emitters
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The total absorption area required shall be computed from the estimated daily gray- water discharge and the design-loading rate based ...
Residential Code 2018 of Nevada > 30 Sanitary Drainage > P3009 Subsurface Landscape Irrigation Systems > P3009.10 Installation > P3009.10.1 Absorption Area
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