As a result, less maintenance is required. This high-velocity flow flushes the drain regularly, removing debris before it collects in the bottom of the slot drain. Dura Trench’s variable height creates a built-in slope that keeps velocities high and debris flushing through the system.This increased flow velocity positively affects how the linear drain functions, making it possible to use a smaller diameter smooth pipe to carry the same amount of water as a larger culvert metal slot drain. Dura Trench’s smooth channel increases the flow velocity.Our Dura Trench heavy-duty commercial grade slot drains are installed on major highways, roads, driveway entrances, curbs and gutters, and many other high-speed and high-flow applications. In comparison with traditional culvert metal slot drains, Dura Trench slot drains offer several significant advantages. As with all our Dura Trench linear drainage lines, custom sizes are available. Dura Trench is most frequently used in heavy-duty commercial applications and in areas where invisible drainage is needed to blend seamlessly into the landscape, such as in parks. Stainless Steel Drains – Linear & Floorĭura Trench & Dura Trench TrueRadius™ Slot Drains are an excellent solution when high flows are required, but grates are not desired.