The Goulds Water Technology Irrigator Pumps have a self priming design that once the pump is primed it will re-prime itself even if water level drops below the end of the suction pipe. Pumping will resume once the water level rises above the end of the suction pipe as long as the pump has been installed correctly. The back pullout design allows disassembly of pump for service without disturbing piping. The bolt down diffuser provides positive alignment with impeller. The FDA compliant, injection molded, food grade, glass-filled Lexan diffuser has stainless wear ring for extended performance in abrasive conditions. The FDA compliant, glass-filled Noryl is also corrosion and abrasion resistant. All cast iron parts receive an Electro-coat paint process that is applied inside and out, and then baked on. The casing is tapped for vacuum gauge and casting drain. Units are powered for continuous operation without damage. . The mechanical seal has carbon/ceramic faces, BUNA elastomers, 300 series stainless steel metal parts. Typical applications include irrigation , air conditioning systems, lawn sprinkling, ground water heat pumps, water transfer and dewatering