Without a backflow preventer, a loss of pressure in the city water supply can cause the "backflow" of water from the irrigation system into your drinking water, causing possible contamination by fertilizers, pet wastes, and other toxic materials. At Precision Lawns, we provide full backflow services, including the installation of new backflow preventers and repair to existing devices. Our service is very fast and we will normally complete backflow certification on the same day or the next. We cover Harris, Chambers, Liberty, and other surrounding counties. We have over 10 years of experience in the water & irrigation industry. We have two State of Texas Licensed Irrigators, LI0009173 and LI0015800.