Why is my Lelit Bianca leaking from the group head?

On the Bianca and other E61 machines, drips at the portafilter rim mean a worn group gasket (replace every 12–24 months); water weeping from the group between shots means the internal mushroom/cam valves need an overhaul; leaks at the brew lever mean the cam o-rings are worn. All are standard E61 service items.

How often should an E61 group gasket be replaced?

Every 12–24 months with regular use. A telltale sign it's due: the portafilter locks in well past the 6 o'clock position because the hardened gasket has compressed.

What does an E61 group overhaul cost?

At Kanen Coffee in Berkeley an E61 dual-boiler grouphead overhaul is around $175, and a full dual-boiler tune-up (group overhaul plus valves, gaskets and calibration) is around $178/hour of bench time with most tune-ups completing in about one hour. Drop-off diagnosis is $185, applied to the repair on approval.

Which machines use the E61 group?

The E61 group appears on most prosumer heat-exchanger and dual-boiler machines, including the Lelit Bianca and Mara X, ECM Synchronika and Technika, Profitec Pro series, Bezzera, Rocket Appartamento and Mozzafiato, and many others — so these fixes apply across brands.

E61 Group Head Leaking? Gasket, Mushroom & Cam Fixes — Lelit, ECM, Profitec

First, Find Which Leak You Have

Run a shot with a flashlight on the group. Drips at the portafilter rim = worn group gasket — the 20-minute fix. Weeping from under the group between shots = the internal mushroom/cam valves need service. Leaking at the brew lever pivot = cam o-rings. The E61 is a 60-year-old design precisely because all three are serviceable.
The Gasket Fix (Most Common)

Group gaskets harden from heat cycles and should be replaced every 12–24 months. If your portafilter swings far past 6 o'clock to seal, the gasket is due. Pop the shower screen, pick the old gasket out, seat the new one, backflush.

We stock E61 gaskets and IMS screens →
Weeping and Lever Leaks: the E61 Overhaul

The mushroom valve and cam assembly need periodic cleaning, descaling, new o-rings, and food-safe lubrication. It's satisfying DIY if you're handy — or a routine bench job for us: E61 grouphead overhaul ~$175; full dual-boiler tune-up ~$178, most done in about an hour of bench time. Drop-off diagnosis is $185 and applies to the repair on approval.

Book an E61 service in Berkeley →

← See all machines we service (40+ brands) ← Back to Quick Problem Finder

E61 Group Head Leaking? The Three Leaks and How to Fix Each

First, Find Which Leak You Have

The Gasket Fix (Most Common)

Weeping and Lever Leaks: the E61 Overhaul