All Plastic Trench Drains Home » Products » Trench Drains » Glass Reinforced Polyester (GRP) & Plastic Trench Drains » Plastic Trench Drains T250 2″ Internal Width, 3″ Deep Channel and Grates (HDPE) T300 3 3/4” Internal Width, 2 7/8” Deep Polypropylene Trench Drain System