Oops Mike!

You're absolutely right!! Sorry, I misunderstood your question! Everything was crystal-clear in my mind, so clear that I didn't even see the error on the site.

I appreciate your pointing out my error--got 'er fixed now (I think!)

For your trouble, you get free use of my pump-building plans! ;)

Thanks, Shawn

> Thanks Shawn. I still question the portion of the instructions below. It
> looks like the dimensions of the inner tube disks are switched for the
> plunger portion and the bottom plate portion. Other than that I think I
> understand it.

> -Cut a disc of inner-tube about 1/8" smaller than the ID of the pipe.
> Sandwich it between the top plates, with the smaller plate against the
> 1/2" pipe. Bolt the stack to the threaded hole with a 1/4" x
> 1" stainless bolt.

> -Cut a disc of inner-tube about 1/16" larger than the ID of the pipe.
> Use a small stainless machine screw, fender washer, and locknut to bolt
> the bottom flange to the bottom plate.