System Capacity
a) The designer must take into consideration the type of building and the activities of the occupants. These factors - particularly the human element - cannot be covered by engineering formula, so it becomes necessary to rely on operating data and records compiled over the years by various users, manufacturers and trade associations. We recommend using the data as detailed below.
b) Assign the indicated number of fixture units to each individual fixture in the piping system that the booster will serve using the fixture unit table below.
c) Total the fixture units for the entire system.
d) Convert the total fixture units to a fixture peak demand in GPM using the fixture peak demand curves found below.
e) Add the flow required for any special duty. The capacity charts show fixture peak demand only. Special requirements such as air conditioning apparatus, process equipment, boiler makeup, swimming pools, etc., must be estimated separately and added to the fixture demand.
NOTES:
1) Occupancy - Capacity ratings are based on the assumption that an equal number of men and women are to be accommodated. Where the occupancy is predominantly female, increase the total pumping capacity by 15%.
2) Laundries - In the case of hotels and hospitals, where a laundry is operated in connection with the building, increase the total pumping capacity by 10%.
1.FIXTURE PEAK DEMAND GPM
2.SPECIAL DUTY DEMAND GPM
3.SYSTEM CAPACITY (1 + 2) GPM
FIXTURE UNIT TABLE
|
Fixture
|
Type of Supply
|
Fixture
|
Number of
|
|
|
|
Control
|
Units
|
Fixtures
|
Total
|
|
Bathroom Group
|
Flush Valve
|
8
|
|
|
|
Bathroom Group
|
Flush Tank
|
6
|
|
|
|
Water closet
|
Flush Valve
|
10
|
|
|
|
Water closet
|
Flush Tank
|
5
|
|
|
|
Urinal
|
Flush Valve
|
5
|
|
|
|
Sink - Kitchen
|
Faucet
|
2
|
|
|
|
Sink - Service
|
Faucet
|
4
|
|
|
|
Dishwasher
|
Automatic
|
2
|
|
|
|
Washing machine
|
Automatic
|
4
|
|
|
|
Hose connection, 1/2"
|
Faucet
|
4
|
|
|
|
|
|
Total Fixture Units
|
|
FIXTURE PEAK DEMAND CURVE