How to Replace an Inlet Valve
Most inlets are universal, meaning they have two screws four inches apart and a 1-1/2 inch diameter hole. Dynavac vacuum inlet ports are usually all universal. Vacuum inlets come in a variety of colors and shapes and are usually interchangeable. Replacing inlets is not difficult and the video is a tutorial to help. Take a moment to determine if your inlets are Basic or Electric. Both universal inlet types have two metal contacts INSIDE the 1-1/2 inch diameter hole. When these two contacts INSIDE THE HOLE are touched with the back of a spoon and shorted the suction starts. Electric inlets have these contacts as well as two small 110 volt connection holes 3/8 inch apart at the top or bottom of the main hole - DO NOT PUT ANYTHING into these small holes.
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