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.