L-Series Pumps Direct Drive Axial economically delivers a very high volume of water at low head through large diameter plumbing for wide waterfalls or where massive flows are required. L-Series Direct Drive Axial pumps feature 3-inch male threaded outlets for ease in plumbing large diameter tubing. Heavy-duty cast iron and stainless steel housing ensures years of dependable service. Dual drive bearings and double silicone carbide mechanical seals reduce friction and wear, prolonging motor life. Thermal overload protection shuts down pump in low water conditions, to prevent serious damage due to overheating.