This is page is still in a very preliminary form.  The picture below shows the first three valve bodies I made to use with a 2.5" O.D. tank.  The first two (left to right) had design features that didn't work out and were never completed.  The third one has had a lot more work done to it than shown below.

I also want to show some designs for check valves and other types of valves on this page but those are still in development or not yet photographed.