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WATER CALCULATION WORKSHEET FOR 3281 MOCKINGBIRD WAY, OSHKOSH 8 NAME/ADDRESS OF PROJECT JUL L 2 8 Z U U i j
INFORMATION REQUIRED TO CALCULATE WATER SERVICE SIZE
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1. Demand of building in gallons per minute. WSFU's 22 1.a. = (GPM) 15.2
2. Difference in elevation from main to extermal pressure tank or to building control valve. (feet) 5.0 1
3. Size of the water meter. (when applicable) 5/8 - 3/4 X 1 _ 1.5 _ Inch l
2 _ 3 _ 4 _ 6 _ Inch
4. Developed length from main or external pressure tank to building control valve. (feet) 50
5. Low pressure at main in street or external pressure tank.
(prig) 44.0
CALCULATE WATER SERVICE PRESSURE LOSS
6. Low pressure at main in street or extemal pressure tank. (value of #5 above) 44.0 1
7. Water service diameter is 1.25 Material is PE Pipe - Schedule 40; ASTM 02104; ASTM D2447
Pressure toss per 100 ft. = 4.66 p.s.i. X 0.5 . 2.3
(decimal equivalent of service length, i.e. 65ft = 0.65) (Subtract line 7. From line 6.) subtotal 41.7
8. Determine pressure gain or loss due to elevation. (multiply the value of #2 above by 0.434) value of "8" 2.2
9. Available pressure after the bldg. Conrol valve. (subtract or add line 8. Enter in "B ".) subtotal 39.5
CALCULATE THE PRESSURE AVAILABLE FOR UNIFORM LOSS (VALUE OF "A ")
B. Available pressure after the building control valve. (from "9" above) value of "B" 39.5 1
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C. Pressure loss of water meter. (when meter is required or installed) value of "C" 3.7
(subtract line C. From B.) subtotal 35.8 . .
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D. Pressure at controlling fixture. value of "D" 20.0
(controlling fixture is MASTER SHOWER PBV )
(subtract the value of D.) subtotal 15.8 1 r
E. Difference in elevation between the building control valve
and the controlling fixture in feet 15 X 0.434 psi/ft. value of "E" 6.5
(subtract the value of E.) subtotal 9.3 1
F. Pressure loss due to water treatment devices, and backflow preVenters which I
serve the controlling fixture.
Pressure loss due to 0 (subtract the value of F)
F1. WSFU's downstream of Water Treatment Device:
F2. Convert wsfu's to GPM using Table 82.40 -3 ;
OR
F3. Convert wsfu's to GPM using Table 82.40 - 3e*
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F4. Refer to manufacturer's graph to obtain pressure Toss:
value of "F4" 0.0 j
(If no water treatment device enter "0 ") subtotal 9.3
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G. Pressure loss through tankless water heaters, combination boiler / hot water heaters, heat exchangers;
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Hot water WSFU's; convert to; GPM = (Table 82.40 -3)
Refer to manufacturer's pressure loss graph to determine loss at required GPM: 0 pressure loss.
(If no pressure loss through hot water appliance enter "0 ") value of "G" 0.0
subtotal 9.3
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