The Comet MP20 Diaphragm Pump provides all the pumping power you need for your spraying and insulation applications. This series of pumps has a strong anodized aluminum construction, making it sturdy and allowing for medium pressure jobs, whether you are spraying liquid fertilizer, insecticide, or just water. The MP20 Diaphragm Pump works generates up to 435 PSI and 5.2 GPM. This version comes equipped with pressure regulator and pulley.