Tyler Pipe & Coupling was started in the midst of the Great Depression in the mid-1930s and has grown into the largest supplier of cast-iron soil pipe, fittings and couplings in the United States. Built on a platform of resilience and an openness to change, the Tyler, Texas-based company today features an iron foundry in Texas, a coupling and gasket manufacturing facility in Missouri and distribution centers in Northern and Southern California and Pennsylvania. Supply House Times recently spoke to Tyler executives Sterling Bowman and Greg Simmons on a variety of subjects, including quality control, customer service and environmental stewardship.