Hi, I wonder if someone could please advise me. Today I switched my laser cutting machine on to cut something (I don't normally do the machine operating, I normally do the designing, so I'm a bit clueless), the next thing I knew there was water everywhere. I searched for the source of the water and found it was spraying out of an hairline crack on the end of the laser tube, photos attached.

I wonder, can the end bit be purchased and replaced or can the crack be safely filled with some kind of waterproof filler/glue stuff or do I need to buy a new tube. Fingers crossed its not a new tube as this one has only been used for about 40 hours

Thank you in advance any assistance would be appreciated