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WATER CALCULATION .nvrnanc =c rtm '3 1 DC. ih nb Lt/
MAMEACORESSOF
INFORMATION REQUIRED TO CALCULATE WATER SERVICE SIZE
1. Demand of building in gallons per minute. WSFU's 9R. 5 = (GPM) 15'5
2. Difference in elevation from main or external pressure tank to building control valve. (feet)
3. Size of the water meter. (When applicable) 5/8' , 314' ,4,,,1° _, 1 -1/2" _, 2" __, 3' , 4' , 6' _.
4. Developed length from main or external pressure tank to !wilding control valve. (feet) Q s'
5. Low pressure at main in street or external pressure tank. (patg) S6
CALCULATE WATER SERVICE PRESSURE LOSS
6. Low pressure at main in street or external pressure tank. (vn +4
ue of # 5 above) S '
7. Water service diameter is a Yi . Material is Poly b 4.+y J ere. . Pressure loss
per 100 ft = .3.7 psi. X . $o (decimal equivalent of service length,le.; 65ft = .65) 1,15
(Subtract line 7. from line 6.) subtotal 6 6.15
8. Determine pressure gain or loss due to elevation, 30 ti
(multiply the value of # 2 above by A34) value of "8" .
9. Available pressure after the bldg. control valve. (Subtract or add Gne 8. Enter in 'B'.) subtotal 5 / r S
CALCULATE THE PRESSURE AVAILABLE FOR UNIFORM LOSS (VALUE OF "A")
8. Available pressure after the bldg. control valve. (from "9' above) Value of "B" 'S Y, S y g
C. Pressure loss of water meter (when meter is required or installed) Value of Tv q 0
(Subtract the C. from fine 8.) subtotal So •
D. Pressure at controfing �,�'e.j �r Litt ) Value of 'D" a o
(Controlling fixture is '''tca�'� .3.1241(,) qJ" )
(Subtract the value of D.) subtotal O • i re
E. Difference in elevation between the balding control valve
and the controlling fixture In feet 9' X .434 psi/ft. Value of 'E" 3.906
(Subtract the value of E.) subtotal QC. 9'0
F. Pressure loss due to water treatment devices, instantaneous
water heaters and bac kflow preventers which serve the
controlling fixture.
(Pressure loss due to Value of "F"
(Subtract the value of F.) subtotal a6.9iz
G. Developed length from building control valve to controlling
fixture in feet 65 X 1.5 Value of "G" 97 .
(Divide by the value of G.) subtotal e 4 ' 6 3
(Water distribution piping material isT cop ?el( )
Multiply by 100
A. Pressure available for uniform toss " _ a 7
j C
SBD -6479 (RK121