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P3009.14.6 Estimating Gray Water Discharge
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The system shall be sized in accordance with the gallons-per-day-per-occupant number based on the type of fixtures connected to the gray water system. The discharge shall be calculated by the following equation:
| C = A × B | (Equation 30-1) |
where:
| A | = | Number of occupants: |
Number of occupants shall be determined by the actual number of occupants, but not less than two occupants for one bedroom and one occupant for each additional bedroom.
| B | = | Estimated flow demands for each occupant: |
Residential—25 gallons per day (94.6 lpd) per occupant for showers, bathtubs and lavatories and 15 gallons per day (56.7 lpd) per occupant for clothes washers or laundry trays.
| C | = | Estimated gray water discharge based on the total number of occupants. |
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