Replaced my PCV valve on my ST170 yesterday, but the new one moves quite easily, if it wasnt for the rubber pipe on the end I think it could quite possibly fall out,

Looking online they say it should be a snug fit, Can the rubber pipe the PCV valve sits in be replaced ?

Or does anyone have any suggestions how I could make it tighter, I thought maybe some kind of tape around it, but dont know if it could perish and do damage later on.