Trench Drain Systems is one of the largest stocking distributors of trench drain channels and grates in the US. We stock all major manufacturers: Zurn, Mea, Polycast, ACO, ABT, Neenah. Ready to ship. Contractor Discounts. Contact TDS today 610-638-1221 for a quick quote. Trench Drain Systems has contingency plans in place for global emergencies to ensure that our orders continue to be processed in a timely manner. We strive to provide excellent service for what is within our control.