Waterproofing - guaranteedTo protect against water damage, all Miele dishwashers feature the Waterproof System. Should you incur damage to property as a result of a defect in the water prot. system you have the reassurance of knowing it is guaranteed for 20 years. In the context of the terms and conditions of the water protection system, Miele will bear the costs for property damage resulting from any defect of the system (with purchase from an authorised retailer and installation in a private household).