PanicStation.org
UK USA
uk Home & property emergencies aquarium leaking • fish tank leaking • waterbed leaking • large container leaking • indoor water leak • sudden water spill • major water damage risk • water near electrics • stopcock emergency • stop tap leak • flooding from tank • burst container indoors • water on floor now • leak upstairs disaster • soaking carpet quickly • ceiling water drip • puddle spreading fast • unknown leak source • pets and water spill

What to do if…
you discover an aquarium, waterbed, or large container is leaking and could cause major water damage

Short answer

Stop the flow, then reduce electrical risk: shut off the nearest water source (or stop the container leaking) and keep well away from sockets/appliances—switch off power at the consumer unit only if you can reach it without stepping in water and it’s dry.

Do not do these things

  • Don’t step into pooled water to reach plugs, extension leads, or the consumer unit.
  • Don’t touch wet plugs, sockets, chargers, or appliances (including aquarium heaters/pumps) with wet hands or while standing on a wet floor.
  • Don’t keep “mopping forever” while the leak is still running—stop the flow first.
  • Don’t lift or move a heavy aquarium/waterbed while it’s still full and leaking.
  • Don’t go near water dripping through ceilings or light fittings—treat that as an electrical hazard.
  • Don’t turn power back on “to check if it works” if water has reached electrics—leave it off until it’s been checked.

What to do now

  1. Get to a safer pause. Step onto a dry surface. Keep children and pets out of the wet area.
  2. If there are electrical danger signs, back off and get emergency help. If you see sparks/arcing, smell burning, hear buzzing/crackling from electrics, or water is entering light fittings/sockets/consumer unit, do not touch anything electrical—move everyone to safety and call 999 (ask for Fire and Rescue).
  3. Stop the leak at the simplest safe point.
    • Aquarium/container: stop any top-ups, siphons, filters returning water, or overflow. If it’s safe, remove nearby items that could fall into the spill.
    • Waterbed: stop any filling. Close the fill valve if you can access it without kneeling in water.
    • If it’s a feed pipe/valve, close the nearest isolation valve if it’s clearly reachable and dry.
  4. If you can’t stop it locally, turn off water at the inside stop valve/stopcock. Turn it clockwise to shut off. If it’s stuck, don’t force it hard enough to risk snapping—move on to getting urgent help (step 7).
  5. Reduce electrical risk (only if safe). If water is close to electrics, switch off electricity at the consumer unit only if you can reach it without stepping in water and it’s dry with no signs of overheating/arcing.
  6. Contain and protect (once flow is stopped or slowing).
    • Put towels/blankets down to slow spread; use buckets/trays under drips.
    • Move extension leads, chargers, electronics, and important papers to a dry, higher surface.
    • If water is dripping from above, keep the area below clear and away from lights/sockets; focus on collecting water in containers and reducing spread.
  7. Call the right help early.
    • If you rent: report it urgently to your landlord/letting agent (or your council/housing association repairs line).
    • If you own: call an emergency plumber if the leak hasn’t stopped, is coming through ceilings/walls, or the stop valve won’t shut off.
    • If you can’t shut off the water at the stop valve (or you’re in a building with a communal supply and can’t access it), contact your water supplier for urgent guidance.
  8. Document once it’s stable. Take photos/video of the source, affected rooms, and any visible ceiling staining/drips. Note the time you discovered it and what you turned off.
  9. Start drying as soon as it’s safe. Ventilate, lift wet rugs if possible, and keep air moving. If large areas are soaked (especially carpets/underlay), consider professional drying to reduce mould and hidden damage.

What can wait

  • You do not need to decide today whether to replace the aquarium/waterbed or redecorate.
  • You do not need to deep-clean immediately—first stop the leak, make it electrically safe, and begin drying.
  • You do not need to settle blame or costs right now—record what happened and report it.

Important reassurance

A fast leak feels instantly catastrophic because it spreads and can involve electrics. Once the water source is shut off and the area is electrically safe, the problem becomes much more controllable: containment, drying, and repairs.

Scope note

These are first steps for the first minutes/hours to reduce harm. Follow-on work (electrical checks, drying strategy, mould prevention, repairs, insurance) may need professionals depending on how far water travelled.

Important note

This is general information, not professional advice. If you suspect any electrical danger, prioritise avoiding shock and get qualified help rather than taking risks.

Additional Resources
Support us