Residential sizing, Commercial sizing – Xylem Wastewater (Technical Manual) User Manual
Page 8
PAGE 8
Wastewater
Goulds Water Technology, Bell & Gossett,
Red Jacket Water Products, CentriPro
Flow Rate Calculation
Residential Sizing
BATHROOM COUNT
Number of Bathrooms
Flow Rate per Minute
1 20
2
30
3
40
4
50
5
60
6
70
FIXTURE COUNT
V = Value style fixture T = Tank Style Fixture
Fixture
Type
Count
Toilet
V 6
Toilet
T
3
Lav Sink
V or T
1
Tub
V or T
2
Shower
V or T
2
Full Body Shower
Add Flow rate: 9 to 65 Gallons per minute to total
Kitchen Sink
V or T
2
Dishwasher
V or T
4
Wash Machine
V or T
8
Bidet
V or T
3
Icemaker
V or T
3
Hose Bib
V or T
4
Fixture
Quantity
Count
Total Count
Toilets
3 3 9
Tub and Shower
2
4
8
Full body shower
15
Lav Sink
1
3
Kitchen Sink
1
2
2
Dishwasher
1
4
4
Icemaker
1
3
3
Wash Machine
1
8
8
Hose Bib
1
4
4
Total
56
FIXTURE COUNT
Fixture
Type
Count
Toilet
V
10
Toilet
T
5
Pedestal Urinal
V or T
10
Stall Urinal
V or T
5
Lav Sink
V or T
3
Kitchen Sink
V or T
4
Tub
V or T
4
Shower
V or T
4
Dishwasher
V or T
4
Icemaker
V or T
3
Commercial Wash. Machine
V or T
6
Hose Bib - Commercial
V or T
6
Full Body Shower
Add Flow rate 9 to 65 Gallons per minute to total
Fixture
Quantity
Count
Total Count
Toilet
50
10
500
Lav Sink
50
3
150
Shower
50
4
200
Full body shower
50
15
750
Dishwasher
50
4
200
Icemaker
50
3
150
Wash Machine
10
6
60
Dishwasher
10
4
40
Hose bib
2
6
12
Total
2062
PLUMBING WATER SYSTEMS
Fixture Units
“Hunter” Estimate Curves for Demand Load
1 – Flush Valve Curve
2 – Flush Tank Curve
Demand GPM
1
2
0
20
40
60
80
100
120
140
160
180
200
220
240
20
40
60
80
100
1 – For system predominantly for flush valves
2
– For system predominantly for
flush tanks
Commercial Sizing
OCCUPANT SIZING
Sewage Selection Chart for Larger Capacity Systems
Gallons per Minute
Number of Homes, T
railers, P
eople, etc.
50
100
150
200
250
300
350
400
500
600
700
800
900 1000
10
20
30
40
60
80
100
120
160
200
400
600
800
1000
1500
2000
(A)
(B)
School/Students
Office/P
eople
Factory/Employees
Trailer P
ark/Trailers
Motel/Rooms
Apartments
Homes in Subdivision
PLUMBING WATER SYSTEMS
Fixture Units
“Hunter” Estimate Curves for Demand Load
Demand GPM
1
2
0
500
1000
1500
2000
2500
3500
100
500
200
300
400
1 – For system predominantly for flush valves
2
– For system predominantly for
flush tanks
180
800