Key Takeaways
- Turn off the water supply immediately if you see any leak
- Miele Waterproof System (WPS) provides automatic shutoff but is not infallible
- Inlet hoses over 10 years old are the highest-risk component
- Never leave a washing machine running while away from home for extended periods
The Bottom Line
Water damage from a washing machine leak can cost thousands in flooring, cabinetry, and structural repairs. Prevention takes 10 minutes every 6 months. The single most important thing you can do is inspect and replace the inlet hose on schedule.
Emergency: What to Do If Your Machine Is Leaking
- Turn off the water supply tap behind or beside the machine — turn clockwise to close
- Switch off the machine at the mains power socket or circuit breaker
- Do NOT open the door if water is visible inside the drum — it will flood out
- Contain the water with towels and a mop. If water has reached other rooms or lower floors, act quickly to minimise damage
- Check the source: is water coming from under the machine, from the door, or from the hose connections at the rear?
Common Leak Sources
Inlet Hose Failure
The water inlet hose is under constant mains pressure whenever the tap is open. Over time (especially after 10 years), the rubber degrades, fittings corrode, and the hose can burst suddenly — releasing full mains pressure water onto your floor. This is the most catastrophic and most preventable failure mode.
Door Seal Leak
A worn, torn, or debris-contaminated door seal allows water to seep past during the wash and spin cycles. Usually a slow leak that worsens over time. Often diagnosed by water appearing from the front of the machine.
Drain Hose Disconnection
If the drain hose works loose from the standpipe or sink connection, water pumped out during drain cycles goes onto the floor instead. Check the connection is secure and the hose is not kinked.
Internal Component Leak
Leaks from internal components (pump seal, dispenser housing, tub seal) require professional diagnosis. These typically start small and worsen over time.
Prevention Checklist
- Inspect inlet hoses every 6 months — look for bulging, cracking, discoloration, or dripping at fittings
- Replace inlet hoses every 10 years proactively, regardless of visible condition
- Turn off the water supply tap when the machine is not in use (especially before holidays)
- Check the door seal monthly for debris, tears, or mould that could prevent a proper seal
- Ensure the drain hose is secured to the standpipe or sink outlet and has the correct loop height (60cm minimum)
- Install a water leak detector on the floor behind or under the machine — battery-powered alarms cost From $15 and provide critical early warning
Miele Waterproof System (WPS)
All current Miele washing machines include WPS — a double-walled inlet hose with an electrically activated safety valve, combined with a float switch in the machine's base pan. If water leaks into the base, the valve closes and the pump activates to drain the machine. WPS is an excellent safety net but is not a substitute for preventive maintenance. It cannot prevent damage from a sudden catastrophic hose burst that overwhelms the system's response time.