This 15mm Water Stop Isolation Valve for Toilet/Fridge is a patented and reliable solution to prevent water damage in your home. It automatically shuts off the water supply if a flexible hose bursts, thereby eliminating further damage. This valve specifically targets the affected hose while keeping the rest of the water supply unaffected. To reset, just follow a simple process: fully close the tap until you both hear and feel a distinct click, then gradually reopen it to its original position