Re: Km future problems that occur?
Any soldered hookah will potentially come with sloppy soldered joints or maybe even good ones, the latter is becoming a rarer occurance though. If you get one that is cracked, contact the vendor to get it replaced. If that is not an option or if the solder develops a crack after you've had it for a wihle, you can either resolder it yourself or use something like JB Weld to patch it. A soldering iron or gun is a poor way to resolder it because the heat dissipates too quickly. Ideally you'd want to use an acetylene or MAPP torch but a butane/propane torch will work also.
If you get a hollow stem KM, don't go banging it against anything to avoid dents.