One of the key features of the Wasteflow® system however is its patented Rootguard® technology. The plastic drip emitters are impregnated with the herbicide Treflan®, which is released in gentle, steady manner to keep the roots 2-3cm away and ultimately keep the flow clear. Wasteflow® also features an anti-bacterial lining on the inside of the entire drip line length. This reduces adhesion of bacterial slimes and algae on the inside walls of the drip line tube. With both the Rootguard® technology and the anti-bacterial lining you have uninterrupted flow. Rootguard® has a ten year warranty against root intrusion. Wasteflow conforms to international standards black poly pipe and Lilac strip, being the colour code for wastewater.