Hi
Since the hose is spiral reinforced i think it will deform rather than collapse and therefore maintain the same overall "passage area". This is what this hose is designed for.
But of course I could be wrong
This is the ducting hose I am referring to
[ame]http://www.ebay.com.au/itm/201114621541?var=500285649209[/ame]
The PVC will definitely hold up!
Steve


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