Espresso Machine Leaking Water? Find the Source (Any Machine)

A puddle around the machine looks dramatic, but most “leaks” are cheap, quick fixes — and some water is meant to be there. The trick, on any machine, is to find where the water shows up first, because each location points to a different cause. This guide is the universal method; for your model’s exact fix, jump to it below.

First, locate the leak

Run the machine with a dry cloth handy and watch where water appears:

In or under the drip tray → tray overflow (and normal post-shot drainage).
Behind, near the tank → tank seating or a crack.
Around the portafilter during a shot → worn or dirty group gasket.
From the steam wand or knob → steam valve seals.
Underneath during use, others ruled out → brew-unit O-ring (bean-to-cup) or an internal hose.

The usual causes (any machine)

Overflowing drip tray — the most common “leak”; empty it.
Tank not seated / cracked — weeps at the back.
Worn group gasket — sprays around the portafilter.
Brew-unit seals (bean-to-cup) — water underneath; clean and grease, or replace.
Steam valve / wand seals — weeps from the wand area.
Scale — makes valves and seals weep.
Internal hose / connector — loosens with age; often a service job.

Find your machine’s exact steps

By machine type

Portafilter machines: drip tray, tank, and the group gasket are the usual suspects.
Bean-to-cup automatics: the removable brew unit’s O-rings (clean and lightly grease them) and seating of the tray/grounds drawer; sealed machines need service for internal weeps.
Pod machines: usually the tank, the head seal, or descaling.

Common mistakes

Assuming any tray water is a leak — some drainage is normal.
Emptying the tray but not seating it (or the tank) firmly.
Overfilling the tank and calling the overflow a leak.
Ignoring a hardening group gasket until it sprays.
Never descaling, so seals weep from scale and you chase phantom leaks.

Fix it for good

Empty the drip tray regularly, seat the tank and tray firmly, replace the group gasket every 12–18 months, lightly grease brew-unit seals, and descale on schedule. Address small weeps early — then follow your model’s steps above.

Frequently asked questions

Why is my espresso machine leaking water from the bottom?

Usually the drip tray is full and overflowing, or the water tank isn't seated and weeps at the back. Empty the tray and reseat the tank first. If water appears underneath during a shot, it's often a worn group seal or, on bean-to-cup machines, a brew-unit O-ring or an internal hose. Note that some water in the drip tray is normal — many machines drain there after a shot and when relieving pressure.

Is some water in the drip tray normal?

Yes, on most machines. After a shot, and when the system relieves pressure (via a three-way valve on machines that have one), water drains into the tray — that's by design, and it's why the puck comes out dry. The problem is only when the tray overflows onto the counter or water pools under the machine. Empty the tray regularly and you'll avoid the most common 'leak' of all.

Water sprays around the portafilter when I brew — what is it?

The group gasket (the seal the portafilter locks against) has hardened or is dirty, so it no longer seals and pressurised water escapes around the edge. Clean the seal and portafilter rim, make sure it locks in fully, and replace the gasket if it's hard or cracked — a cheap part and a quick job that also restores lost pressure.

Can limescale cause leaks?

Yes. Heavy scale stops valves and seals seating cleanly, causing slow internal weeps. Descaling often stops a scale-related leak outright and protects the machine. In hard water, regular descaling (or a recognised filter) prevents both leaks and flow problems, so it's worth keeping on schedule.

My machine leaks underneath during a shot — is it serious?

Not necessarily. Beyond a full tray or unseated tank, water underneath can come from a worn group seal running down inside, a brew-unit O-ring (bean-to-cup), or a loosened internal hose. Clean and check the seals and descale first. If water still pools after that, an internal seal or hose may need attention — on sealed or compact machines that's often a service job.