As John noted, I did not need to worry about having a one-way valve on the inlet. I had plenty of down-slope pipe to pull all the air on out.

Here's a picture of the inlet I rigged up. Sanded a radius on the pipe for smooth flow, covered with a wire mesh and a top plate to keep the air from getting sucked down a vortex.
[img]http://i.imgur.com/EyBy04p.jpg?1[/img]

doh! not sure why its not displaying the photo...

Last edited by Redonthehead; 04/03/17 03:26 PM.

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