Step 2 Measure Your Water Pressure

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To work out how many and what type of sprinklers, pop ups or drippers, you’ll need to measure the water pressure on your garden tap. To do this, measure the time in seconds it takes to fill up a 9L bucket at your tap on full pressure. Then using the size of the bucket, which in our case was 9L, divide it by the seconds it took to fill up, then multiply by 60. For example, if it took 20 seconds to fill up then 9 ÷ 20 x 60 will give you the number of your maximum flow rate per minute. This will help you choose what products you need to irrigate your garden.