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.

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


Your flow rate:*

Litres per minute

*The calculator takes off 20% to allow for friction loss in the irrigation system

How much drip line can I use?

It depends on the drip line type you choose to use — and your flow rate. Use this handy calculator to check the right length for your garden.

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