The pipe is made of two parts. It needs to be assembled
Cause the pipe is made of glazed ceramic, there is the possibility that some of the glaze stuck the openings. In this case, you need to grind or even drill this parts to clear it.
If it's a little bit loose use some papper or fabric to fit it tigtly.
You can find the mouth peace here
Please order the pipe only if you think you can handle this!