Vacuum line.


Replacing the 1/2" vacuum lines on the F-6 brakes and two-speed axle. Can't seem to source anything.

 

I think it's really 15/32", sold as power brake vacuum hose.

Gates 27233 - Power Brake Vacuum Hose | O'Reilly Auto Parts

 

Thanks a lot for steering me in the right direction. Found the heavy duty stuff.
Green Stripe® Vacuum Brake Hose 69W | Gates Corporation

 

As noted, power brake hose is a specialty item (DOT approved) and should never be substituted with generic vacuum hose. I'm writing this more for future search posterity than personal information, since you already have your answer.

 

I believe that is why it's an odd size, to differentiate it from pressure hose.

 

True, but that doesn't stop a lot of people from routinely substituting 3/8 fuel line for 11/32 brake hose and add a couple extra hose clamps to hold it on.