Electric Water Heater Leaking from the Bottom: Repair or Replace?
An electric storage water heater leaking from its base requires urgent evaluation. Water mixing with 230V electrical terminals presents a serious shock hazard, and an undetected tank rupture can quickly release 80 to 100 liters of water onto your floor.
Step 1: Disconnect Electrical Power Immediately
Before inspecting or touching the heater, unplug it from the wall outlet or switch off its dedicated MCB circuit breaker in your electrical panel.
Case 1: Dripping from the 8-Bar Safety Relief Valve (Normal/Repairable)
On the cold water inlet pipe (marked with a blue ring), there is a small brass valve with an overflow nozzle and drain lever. During heating cycles, expanding water naturally causes a minor trickle from this valve.
Solution: Connect a small clear PVC tube from the valve nozzle into a waste pipe or fit a pressure reducing valve if mains pressure exceeds 4 bar.
Case 2: Leaking from the Heating Element Flange (Repairable)
If water weeps from around the lower plastic access panel, remove the cover. If drops emerge from the circular metal flange holding the immersion heating element and magnesium anode, the rubber sealing gasket has hardened with age.
Solution: Drain the cylinder, remove the flange, descale the tank, and fit a new gasket, heating element, and sacrificial anode (€60-€100 repair).
Case 3: Rust-Stained Leaks from Tank Seams (Requires Replacement)
If brown, rusty water oozes through external metal casing seams or around temperature gauge openings, the internal enameled steel tank is perforated by galvanic corrosion and limescale attack.
Solution: The internal boiler shell cannot be welded or patched; the entire water heater must be replaced with a new unit.
FAQ
What is the average lifespan of an electric water heater?
In hard water coastal areas, standard electric water heaters last 4 to 7 years. In soft water zones or with regular magnesium anode replacement every 2 years, they can reach 10 to 12 years.
How much does a new electric water heater cost installed?
A new 80-liter to 100-liter energy-efficient electric water heater (Ariston, Fleck, Junkers) including delivery, installation, and disposal of the old unit costs between €240 and €420.