The mechanical design of the Neptune Series 7000 dia-pump eliminates the use of contour plates on the liquid side of the diaphragm. The simple, straight-through valve and head design allows for improved flow characteristics. The Series 7000 is self-priming and provides superior performance when pumping chemicals such as sodium hypochlorite. With a maximum capacity range from 15 to 300 gallons per hour at 150 pounds per square inch, the Series 7000 is available in PVC, Kynar and 316 stainless steel liquid ends.