1. Typical flow rates for various types of outlets / fixtures Non simultaneous use
Flow rate K
Liters/min. Factor
1 12 1 1
2 6 2 1
3 3 3 0.7
4 6 4 0.6
5 30 5 0.5
6 15 6 - 8 0.42
7 10 9 - 13 0.32
8 6 14 - 18 0.26
9 90 19 - 25 0.22
10 6 26 - 36 0.18
11 30 37 - 45 0.16
12 12 46 - 55 0.14
13 6
14 40
Note
To calculate the approximate minimum water required in L/min. determine the flow rate for all fixtures in the building
then correct the non simultaneous use by multiplying by the appropriate K factor for the total number of fixtures in the
building.
Dish washer
No. of
fixtures
Toilet with cystern
Toilet withflushing tap
Urinal with automatic cystern, per position
Common urinal with flushing tap
Washing machine
Bath
Shower
DescriptionItem
Sink
Washbasin
Common wash basin
Bidet
Stand pipe
20mm watering outlet