La Pavoni boiler cap, boiler or base leaking
Most likely cause
A hissing cap usually needs a new cap gasket. Water from the base after a shot is more serious: Kanen Coffee says the gasket has failed and must be replaced before further use. Never open the cap while the machine is on or under pressure.
Parts differ by generation. Not sure which you have? Check in two minutes.
Safety first
La Pavoni’s manual is direct: do not open the boiler cap while the machine is in operation or still under pressure, to avoid burns. To refill, switch off, open the steam knob slowly and wait for all the steam to escape before unscrewing the cap.
Leaking or hissing at the cap
The cap seals on a gasket. When it hardens or cracks, steam escapes around the cap. A replacement cap gasket is in full gasket kits; Orphan Espresso lists it among the extra parts in its full kits. Do not overtighten the cap to stop a leak.
Water from the base after a shot
Kanen Coffee says that if water leaks from the base after a shot, the gasket has failed and replacement is mandatory before further use. La Pavoni’s current parts list includes an 80mm boiler gasket for the lever family. Because this involves separating the boiler from the base and the heating element sits there, it is a job many owners hand to a technician.
Leaks at the sight glass
See sight glass leaks.
Parts for this job
Complete replacement gasket set, Professional
Listed for: Listed for Millennium and pre-Millennium Professional
Full kits include the boiler cap gasket.
MacMaxe Europiccola rebuild gasket kit
Listed for: Listed for pre- and post-Millennium Europiccola
Check the listing includes the boiler cap gasket.
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Related
Sources
La Pavoni manuals, parts lists and product pages; Kanen Coffee repair notes; Orphan Espresso.