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Munro & Associates 1 /�
Client: LRS Architects PL M oQ --/ o (l L `�
Project: Tigard Senior Center """'����...JJJ
Project No: 1477 -01
WATER SUPPLY AND DISTRIBUTION SIZING Flush Valve w/PRV (2005 Oregon State Plumbing Specialty Code)
Water Supply Fixture Units (WSFU) and Minimum Fixture Branch Pipe Sizes (3)
Min. Meter &
Fixture Street
Branch Service
Pipe Size Assembly Total
Plumbing Appliance or Fixture (2) (1) (4) uan Private FU Quan Public FU Quan FU FU
Bathtub or Combination Bath/Shower (fill) 1/2" 0 4.0 0 4.0 n/a Na 0
3/4" Bathtub Fill Valve 3/4" 0 10.0 0 10.0 Na Na 0
Bidet 1/2" 0 1.0 Na n/a Na Na 0
Clothes washer 1/2" 0 4.0 1 4.0 n/a Na 4
. Dental Unit, cuspidor 1/2" n/a Na 0 1.0 Na Na 0
Dishwasher, domestic 1/2' 0 1.5 2 1.5 n/a n/a 3
Drinking fountain or Watercooler 1/2" 0 0.5 4 0.5 0 0.75 2
Hose Bibb 1/2" 0 2.5 1 2.5 n/a n/a 2.5
Hose Bibb, each additional (8) 1/2" 0 1.0 1 1.0 n/a n/a 1
Lavatory 1/2" 0 1.0 7 1.0 0 1.0 7
Lawn Sprinkler, each head (5) 0 1.0 0 1.0 Na n/a 0
Mobile Home, each (minimum) 0 12.0 Na n/a n/a n/a 0
Sinks
Bar 1/2" 0 1.0 0 2.0 n/a Na 0
Clinic Faucet 1/2" Na n/a 0 3.0 n/a Na 0
Clinic Flushometer Valve
with or without faucet 1" n/a n/a 0 8.0 n/a n/a 0
Kitchen, domestic 1/2" 0 1.5 3 1.5 Na n/a 4.5
Laundry 1/2" 0 1.5 0 1.5 n/a n/a 0
Service or Mop Basin 1/2" 0 1.5 4 3.0 n/a Na 12
Washup, each set of faucets 1/2" n/a n/a 2 2.0 n/a n/a 4
Shower, per head 1/2" 0 2.0 0 2.0 n/a n/a 0
Urinal, 1.0 GPF 3/4" 0 3.0 1 4.0 0 5.0 4
Urinal, greater than 1.0 GPF 3/4" 0 4.0 0 5.0 0 6.0 0
Washfountain, circular spray 3/4" n/a n/a 0 4.0 n/a Na 0
Water Closet 1.6 GPF Flushometer Valve 1" 0 5.0 4 5.0 0 8.0 20
Water Closet, 1.6 GPF Gravity Tank 1/2" 0 2.5 0 2.5 0 3.5 0
Water Closet, greater than 1.6 GPF Flushometer Valve 1' 0 7.0 2 8.0 0 10.0 16
Water Closet, greater than 1.6 GPF Gravity Tank 1/2" 0 3.0 0 5.5 0 7.0 0
Total Fixture Units 80
Fixture Demand Flowrate, gpm 61
Comercial Dishwasher 0 gpm (counted as 2 domestic dishwashers; approx fill =1 hose bibb)
Total Demand 61 gpm
Sizing of CW Service Line (Street to Furthest Fixture)
Equivalent length from meter to furthest fixture 465 ft Equivalent length estimated as Lengthxl.1.
Available water pressure at Nearest Hydrant 104 psi (Phone Conversation: John Goodrich,
City of Tigard, 9/11/07)
Minimum residual pressure 25.0 psi
Elevation of highest fixture 5 feet
Pressure available for friction loss 76.9 psi
Average permissible friction loss in pipes 16.5 psi per 100 ft
Maximum permissible velocity in pipes 8.0 feet per second
CW Service Line Size 1.5 inch
Actual friction loss In pipes 10.3 psi per 100 ft
Actual velocity in pipes 11.0 feet per second
Munro & Associates
Client: LRS Architects •
Project: Tigard Senior Center
Project No: 1477 -01
Sizing of CW Service Line (PRV to Furthest Fixture)
Equivalent length from meter to furthest fixture 190 ft Equivalent length estimated as Lengthxl.5.
Available water pressure at PRV 70 psi
Minimum residual pressure 25.0 psi
Elevation of highest fixture 15 feet
Pressure available for friction loss 38.6 psi
Average permissible friction loss in pipes 20.3 psi per 100 ft
Maximum permissible velocity in pipes 8.0 feet per second
CW Service Line Size 1.5 Inch
Actual friction loss In pipes 10.3 psi per 100 ft
Actual velocity In pipes 11.0 feet per second
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