Originally Posted by Capt.Bill11
Yeah, in 10+ years or more it will. Before then it will no longer be very clear and you'd have to change it out to see through it again.
Although with all the vinyl sight tube I've changed out over the years, I can't ever say I've seen it get "brittle"' as in break apart when you remove it, just seen it get hard or very stiff.
I've seen it brittle and fracture in less than two years. The problem with buying non-rated stuff is that there are hundreds of formulations of clear plastic hose and you have no idea what they are or are not compatible with and neither does Home Depot or the Chinese factory that made it. Your boat, your choice.
As for newb's, this kind of conversation is good for them, they too can make their own choices.