grazi

So I'm tracing down a couple vacuum leaks on my 94 LT1 TA. I put pressure on the hose that goes from the purge solenoid to the charcoal canister and I'm not holding pressure.. I changed the two short rubber hoses that mend the plastic hose to steel line which were leaking. I was curious if the charcoal canister is supposed to hold pressure or is it designed to blow it off. I didnt have a vacuumn pump or gauge so I blew into the engine side with my mouth. Thanks alot Please help