Well, I tried normal pipe insulation, but the foam and rubberized foam from lowes/home depot to make a silicone tubing float like what they have on the blichmann auto sparge. Before use I tested it in boiling water just to make sure, both failed miserably at that temperature.
So I shot an email over to blichmann engineering and found out that the little black piece of foam they use on the auto sparge to make the outlet silicone tube float is a silicone foam, also sometimes called silicone sponge, and I want some.
My silicone tubing its self does not float and I want it to to prevent back siphoning while my pumps are off. The thing is, Mcmaster carr is the only place I've found so far that will sell it without requesting a quote, but it's 60 bucks for 6 feet, and that's the shortest they sell it, when I only need maybe 5 inches of the stuff.
So my question is, does anyone have an idea of where I could grab some silicone foam/sponge pipe insulation 3/4 ID by the foot, etc?