Paul,
I've been looking for anti-collapse hose for my radiator return, but have
been unable.
my solution is to insert aluminum flex hose inside my radiator return hose.
it's 1/8 inch smaller than the inside diameter of my radiator hose.
I'll make sure the ends do not chaff the inside of the radiator hose.

http://www.mcmaster.com/#54995k17/=2jag5g

Do you see any potential pitfalls here?

Brian Trubee

That looks like a better solution  than the corrugated stuff Chuck Dunlap
used. Smoother inside.


Paul Lamar


Automotive hoses often have a coiled spring inserted their length..


Matt-