$24.75 – $55.75
The diaphragm is made of Teflon and is used to separate the oil and the liquid (alum). The diaphragm, with the help of ball check valves, pushes the alum through the pump.
3 5/8 (3.625) Aquflow OEM, 4 1/8 (4.125) Neptune OEM, 3 5/8 (3.625) Aquflow PDQ, 4 1/8 (4.125) Neptune PDQ