Quote Originally Posted by Sgt.Gator View Post
Yep, same thing. Good find. Although it's a flapper valve, may not work well for air. A big PCV valve (ball valves usually) would work too.
Hmm not sure if it will work now. I called Peterson. Their's is a metal valve (kinda like an exhaust valve with a 2 lbs spring), The other is a PTFE flapper valve. Yeah- I'm not sure if the PTFE flapper could handle the vacuum or not.