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Water System Sizing Table
| Schools | | Number of Students | Gallons per day required | Peak Demand with flush valves | Peak Demand with flush tanks | HOT ONLY Peak Flow | HOT ONLY Gallons Per Day | | 100 | 2,500 | 60 | 30 | 15 | 500 | | 200 | 5,000 | 90 | 50 | 23 | 1,200 | | 300 | 7,500 | 120 | 80 | 30 | 1,800 | | 400 | 10,000 | 150 | 90 | 40 | 2,400 | | 500 | 12,500 | 180 | 100 | 50 | 3,000 | | 800 | 20,000 | 250 | 130 | 60 | 4,800 | | 1,000 | 25,000 | 300 | 160 | 70 | 6,000 |
| Apartments and Mobile Home Parks | | Units | All Soft | Peak Flow | Hot Only | Hot Peak Flow |
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| 4 | 720 | 22 | 240 | 12 | | 5 | 900 | 25 | 300 | 15 | | 6 | 1,000 | 30 | 360 | 15 | | 6 | 1,000 | 30 | 360 | 20 | | 8 | 1,440 | 40 | 480 | 26 | | 10 | 1,800 | 50 | 600 | 30 | | 15 | 2,700 | 75 | 900 | 45 | | 20 | 3,600 | 90 | 1,200 | 45 | | 30 | 5,400 | 110 | 1,800 | 65 | | 40 | 7,200 | 125 | 2,400 | 75 | | 100 | 18,000 | 220 | 6,000 | 110 |
To use this chart, determine if the fixtures are open to the public or are for private use. Multiply the actual number of fixtures by the weighted value listed in the chart below. Take the total value to the following page
| Fixture | Occupancy | Type | Cold Value | Hot Value | Total Value | | Water Closet | Public | Flush Value | 10 | - | 10 | | Water Closet | Public | Flush Tank | 5 | - | 5 | | Urinal | Public | 1" Valve | 10 | - | 10 | | Urinal | Public | 3/4 Valve | 5 | - | 5 | | Lavatory | Public | Faucet | 1.5 | 1.5 | 2 | | Bathtub | Public | Faucet | 3 | 3 | 4 | | Shower | Public | Mixing Value | 3 | 3 | 4 | | Service Sink | Public | Faucet | 2.25 | 2.25 | 3 | | Kitchen Sink | Public | Faucet | 3 | 3 | 4 | | Drinking Fountain | Public | Valve | 0.25 | - | .025 | | Dish Machine | Restaurant | Valve | - | 1 | 1 | | Laundry Machine | Public | 8# | 2.25 | 2.25 | 3 | | Laundry Machine | Public | 16# | 3 | 3 | 4 | | | Water Closet | Private | Flush Valve | 6 | - | 6 | | Water Closet | Private | Flush Valve | 3 | - | 3 | | Lavatory | Private | Facuet | 0.75 | 0.75 | 1 | | Bathtub | Private | Faucet | 1.5 | 1.5 | 2 | | Shower Stall | Private | Mixing Valve | 1.5 | 1.5 | 2 | | Kitchen Sink | Private | Faucet | 1.5 | 1.5 | 2 | | Laundry Sink | Private | Faucet | 2.25 | 2.25 | 3 | | | | | | | | Dishwasher | Private | Automatic | - | 1 | 1 | | Clothes Washer | Private | 8# | 1.5 | 1.5 | 2 |
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