Originally Posted by ans136
What if I stuck a PVC pipe down the cardboard tube? Essentially going inside the metal coil and reinforcing the cardboard from the inside.
The metal coil runs the entire length of the hose not just in the handle. It is going to rust and eventually particles of metal and rust will begin to fleck off and could be inhaled. You need to replace the hose (you are already doing that) and if you want to salvage the hose you need to replace everything that is not wood or acrylic.