Installation calculators

Try our calculators for a better irrigation system disposition. First, you will need to complete the bucket test below and define your flow rate. This will determine the results you get on the different calculators.

How many sprinklers your system can run at one time depends on how much your home can supply. Your flow rate will determine the total number of pop-up sprinklers you can use at any one time. Different pop-up sprinklers will have their own flow rate. Similarly, drip lines contain emitters which distribute water at a certain rate (typically 2 l/h). The bucket test will also tell you just how much drip line you can run on one zone.

An easy way to calculate your flow rate is by doing a bucket test. All you need is your garden tap, a standard 9 litre bucket and a stopwatch. Before you start, make sure you measure your water flow at times of peak water usage. If using a tap timer or pressure reducer, make sure you measure the flow with the device fitted.

Asset 5

Calculating your flow rate

  • 1. Place a 9 litre bucket under your garden tap, and turn the tap on full boar.
  • 2. Using a stopwatch, time how long it takes the water to reach capacity.
  • 3. Enter your results in the fields below to calculate your flow rate:
How many seconds did it take to fill the bucket?
How many
seconds did
it take to fill
the bucket?
What size was your bucket?
What size
was your

(In litres)

Your flow rate:*


Litres per minute
*The calculator takes off 20% to allow for friction loss in the irrigation system
How many drippers/tricklers can I run?

It will depend on your soil type for which dripper or trickler you choose to install. You can use the hand test to check the best suited product based on your garden soil conditions. See Handy Tips

Dripline Title

Dripline Text

Sprays Title

Sprays Text


Ready to start planning your irrigation?

Complete the step-by-step tutorial


See Handy Tips