Ben,
What grade silicone hose do you recommend to avoid collapse with vacuum but still have flexibility to fit?
I ask because the 5 ply &/or thick wall silicone hoses are quite stiff and the wire-wound silicone hoses are a premium price.
I have used these (sorry they are English!):
Wire Reinforced Silicone Hoses - AutoSiliconeHoses.com - Silicone Hose Store - Buy Silicon Direct