The clean water tank of my wet-and-dry vacuum leaks while docked
Home Nura guide — category Vacuum-Mop Robots
Diagnosis
A clean water tank that leaks while the machine is charging is most often down to a worn or misplaced seal or cap, or a cracked tank. Take the tank off the dock, dry everything and check the seals and any cracks before charging again.
Possible causes
- Worn, shifted or dirty cap or valve seal — water seeps from the cap or the outlet valve.
- Tank not clicked fully onto the dock — water runs out through the connector instead of feeding the brush.
- Cracked or warped tank — water leaks along a fine line, often after a knock or from using water that was too hot.
- Tank overfilled or filled with a foaming product — pressure and suds force water out through the vent holes.
- Outlet valve blocked by limescale or residue — it no longer closes fully and drips even when idle.
Recommended procedure
- 1Switch the machine off, unplug the charging dock and mop up water around the electrical contacts before doing anything else.
- 2Remove the tank, empty it completely and dry it; only put the machine back on the dock once the contacts and dock are dry.
- 3Examine the cap and valve seal, wipe them with a soft cloth and press them back flat into their seat.
- 4Hold the tank up to the light to look for cracks, then test it filled over a sink without tilting it.
- 5Fill with cold or lukewarm water only, up to the maximum mark, and no foaming product other than the one the manufacturer recommends.
- 6If the seal is damaged or the tank cracked, order the original part; do not use glue on the water tank of an electrical appliance.
Repair or replace?
If the tank is cracked and the part is no longer sold, or water has got into the dock or electronics area, the machine becomes unsafe to use. Replacing the whole unit is then wiser than a makeshift repair.
Other common failures on this category
These incidents affect the same type of appliance — diagnosis and recommended procedure for each.
Frequently asked questions
In Europe, any vacuum-mop robots bought new from an official reseller benefits from a legal conformity guarantee of at least two years (Directive (EU) 2019/771). This guarantee covers defects present at delivery, whenever they first manifest.
You can pick: European law puts the legal guarantee on the seller, not the manufacturer. In practice, a store return is usually faster, but the manufacturer can repair if the damage is out of warranty. Keep proof of purchase.
Our public methodology adds a Nura Score /10 penalty to any vacuum-mop robots whose recurring failures are documented in European user feedback. A model that breaks too often never tops our charts, brand notwithstanding.
Yes, within the limits of the European "right to repair": routine maintenance tasks (cleaning, gasket replacement, calibration) never void the legal warranty. Only irreversible hardware modifications can be a problem. For a vacuum-mop robots, any handling documented in the manufacturer's manual stays covered.
The directive imposes a two-year legal conformity guarantee, with a presumption of pre-existing defect during the first twelve months — the burden of proof is on the seller. For a vacuum-mop robots that breaks in that window, you're entitled to free repair or replacement, no strings attached on typical use.