My canister had the same problem,had no clamps on
the hoses. Hoses got older and started to leak. I cut the old hose off of the tubing and installed AT hose with clamps. AT hoses with hose clamps work well, on the low pressure side, of course. Here is number 1-927-463-6175. I keep it on my phone. It took me a long time to find AT or PS hose of the right diameter. I also did the same trick on my 97 M3. I do not remember the diameter, I did it a long time ago.