Originally Posted by 335okc
if i'm not mistaken, the hose is reinforced (i don't know by what material), but you can see the reinforcement on the cross section.
do you have any link to vendor selling these specialized silicone hoses?
Polyester reinforced hose are the worst and they will expand in just 1-2 weeks with plain silicon as the oil will be absorbed by the fibers. The polyester is fine on fluro hoses.
Samco makes fluro hoses but they are not cheap (about $100 each). I did find one vendor who makes a 2.5" coupler at $15 each and they do have other sizes. This is a fluro lined hose.