I have a few technical question about my de-airing Shimpo pugmill NVA-04S. Right near the pressure valve, there is a little cylindrical glass container which used to be empty and after a few months of using the machine, it is now completely filled with porcelain. Could anyone please tell me how I could clean this little glass container and what it is for exactly?
My other question is about the oil. The can of oil that came with the machine when I bought it this summer is now finished. Could you please tell me what kind of oil I can use?
Thank you very much!