I have an old PAR diaphragm pump that was used to pump out the shower water. I want to re-use it, but am wondering about the wiring. It only has two black wires coming off of the motor. Can either wire be a positive or a negative? Does it affect the direction the pump pulls water? I found the original wiring diagram, and it doesn't specify, so i'm going to assume it does not matter?
Last edited:

