Hi,

Can anyone advise about hoses to connect the system together? I designed it expecting 5/8" ID hose. It concerns me though, that once a vacuum is being pulled the hoses could squash shut. Are there special types of hose I need to get? If not, I was thinking to use the engine breather / radiator hose for cars.

Actually I'm curious how any hose soft enough to bend easily can support a vacuum inside without squashing closed?