Smart Products USA’s Series 3000 liquid pumps feature built-in check valves with customizable components. For optimal sealing in a wide variety of environments, customers can choose from four O-rings to include: Buna-N, EPDM, Viton® and Silicone. Other options include port size of 0.25-inch (6.35-mm) or 0.125-inch (3.175-mm) size, voltage of 12 or 24 VDC and more. Additionally, Series 3000 pumps are high-capacity, self-priming and non-polarized. They run wet or dry and feature a single diaphragm, positive displacement design.