[JIMSVX]

Thanks Harvey. After I read your reply I went back and looked around the underside of the manifold. What do you know, there is a vacuum tap on the manifold right under the vacuum tank. Now I just have to be careful to mount the check valve the right way!

I did a search on this system and your name, and I found This link . Your explanation of how the IRIS system works made it all very clear. Thanks for helping me understand it. Now all I have to do is wait for gaskets, etc., so I can start putting it back together.

- Jim