This Waterblock system. Automatic water shutoff system helps limit damage from a leaking or overflowing water valve. Protect your home or business from an overflowing toilet, ice maker, coffee maker, etc.. Save money on your water bill from a device that doesn't shut off properly. Prevent a flooded bathroom or condo from a runaway toilet valve or ice maker. This is a pointofuse device, not a whole house solution, but a dishwasher that doesn't shut off or a toilet that keeps running can cost thousands in water use and/or damage.