Stovetop Bialetti Moka pot leaks water or coffee from the middle seam while brewing.

Safety first: Remove the pot from heat immediately if it is leaking heavily. Allow it to cool before disassembly.

• Clean sealing surfaces: Unscrew the upper and lower chambers. Wipe the mating surfaces and threads with a damp cloth to remove coffee oils and grounds.
• Inspect and replace gasket: Remove the gasket and metal filter plate. If the gasket is flattened, cracked, or stiff, replace it with a Bialetti-compatible gasket of the correct size.
• Check filter plate: Ensure the metal filter plate is flat and free of dents. Replace if warped.
• Do not overtighten: Reassemble and tighten firmly by hand, but do not use tools that could deform the threads.

Persistent leaks after gasket replacement may indicate damaged threads or a deformed chamber, requiring replacement of the upper or lower body.