I purchased this in the late 80s from an industrial liquidation. My intent was to use it as a circulation pump on a biodiesel system I was building that never came to fruition. At the time I purchased it I did a service on it to be sure of it's operation.

I just retested it using water and works just as new. I did have the inlet, outlet and air connection on until I boxed it up so some evidence of these connections are evident.

As in the pictures it is evident that it was never bolted down or installed just shelf wear.