A drip (or trickle) irrigation system delivers water slowly and directly to plants, allowing water to be absorbed effectively by the root system. The water is slowly and consistently supplied so the roots have a chance to take up the water before it runs through or evaporates.

The system is particularly useful for providing individual watering, for example where a particular plant requires more water than others growing around it. It is also handy for watering plants in containers, grow bags and window boxes or for rows of vegetables.

A drip irrigation system comprises of a number of thin tubes that run along the soil surface supported by spikes stuck into the ground. Drip heads are attached to the tubes wherever needed. The system works on low pressure (about 10 to 30 psi) so a pressure reducer must be fitted in between the tap and the water tubes. This unit usually doubles as filter.