Report Pugmill question in Equipment Use and Repair Posted August 25, 2020 The arrows pointing to 1 and 2 are separate pieces of metal or machined from one piece? They should be one piece, but if you're questioning the seal across the machined surface of 2, I don't see how you're saying this problem was caused. A failure of gasket or seal across the machined surface should cause a failure on the machined surface of 2, I would think. I'm thinking an expert machinist or metallurgist opinion would point to a manufacturing flaw. That's really a localized corrosion. I'm thinking the fix is going to be either a replacement part or grinding out the corrosion and refilling and machine work. Expensive either way, but Shimpo's "clean every time you use it" is not the industry standard for pugmills. I don't use porcelain, so maybe someone else has a contrary opinion. If you can bring expert opinion to Shimpo's attention, they may reconsider their position. Them replacing the part would be the best case.