Finding water under the back of your espresso machine where the tank sits? A leaking water tank is usually a seating or valve-seal issue rather than a machine failure, and it is worth pinning down before water reaches the electronics.
Here is why the tank leaks and how to fix it.
This article will teach you:
- Where tank leaks come from
- How the tank valve seals
- What to check first
- When to replace the tank
Why the Tank Leaks
- The tank not seated fully on its base valve.
- A worn valve seal or O-ring.
- A hairline crack in the tank.
- Overfilling past the maximum line.
What You’ll Need
- A dry towel
- A replacement seal if needed
- Your owner’s manual
How to Fix a Leaking Water Tank
- Reseat the tank. Press it down firmly so the base valve engages.
- Dry and watch. Wipe everything dry, then run water and watch where it appears.
- Inspect the valve. Check the bottom valve and O-ring for wear.
- Look for cracks. Fill the tank out of the machine to spot a crack.
Pro Tip: Most tank leaks are simply a tank that is not pressed down onto its base valve. Reseat it firmly first, since that fixes the problem far more often than any seal.
When to Look a Little Deeper
Because the tank feeds the pump, it helps to check flow, and reviewing a machine that will not pump, a portafilter leak, or a solenoid valve fault can reveal related issues.
When to Call a Pro
A cracked tank should be replaced, not glued. If water is reaching the base or electronics, stop using the machine until it is dry and the leak is fixed.
Wrapping Up
Tank leaks are usually seating or the valve. Here’s the recap:
- Reseat the tank firmly.
- Dry it and trace the leak.
- Inspect the valve and O-ring.
- Replace a cracked tank.
Reseat first, and the leak often stops. You’ve got this.