Install a drip-line watering system
To determine the flow rate of the tap for the irrigation system, run it at a normal rate into a 10L bucket and time how long it takes to fill.
So if it fills in 30 seconds that is 20L a minute or 1200L an hour (2 x 10 = 20, 20 x 60 = 1200).
The line we used puts out 1.6L an hour per dripper, with a dripper every 300mm.
To find the number of drippers the tap can feed, divide the flow rate by the drip rate (1200 ÷ 1.6 = 750).
This means the tap can feed 750 drippers.
Calculate how much drip line you can install by multiplying the total number of drippers by the interval between them in metres (750 x 0.3 = 225).
In theory, this tap could supply 225m of drip line, but it’s better to stick to a length that is 50% of your tap’s full capacity, or less.
The recommended length may also vary with the drip line, so check the manufacturer’s instructions.
TIP: If using grey or recycled water, or harvested non-potable tank water, make sure you use the correct colour coded purple or mauve pipe.