We install two different types of grates; driveway grates and box grates. Driveway grates are installed in front of the garage way door. These grates can be steel or plastic. We only install the steel because of the durability and longevity. Box grates are installed in low lining areas where water pools. The box grates collects the water and discharges to a predetermined location using 4 inch scheduled 35 PVC.