The Ajax WaterStop is a wireless smart water shut-off valve designed to protect your home from flooding by automatically closing the water supply when LeaksProtect sensors detect a leak. This black device uses the proprietary Jeweller communication technology to maintain a stable connection with Hub Plus, Hub 2, Hub 2 Plus, or Hub Hybrid over distances up to 1,100 meters in an open area, ensuring you stay informed regardless of where the valve is installed. Built for reliability, it features a ¾ inch (DN 20) diameter and is compatible with ISO 5211 ball valves. The actuator provides a torque of up to 8.5 N·m, allowing it to shut off the water in approximately 7 seconds. For flexibility during installation, the actuator can be mounted in four different positions to fit your specific plumbing layout. You can manage the system via the Ajax app or use the physical manual control button and closing lever for direct operation. Power is provided by four CR123A batteries that can last up to 3 years, though it also supports an external 9–12 V DC power supply for continuous energy. To ensure long-term durability, the system includes protections against overcurrent and actuator jams, while notifying you of overheating through the app. Weighing 2900 g and measuring 104 x 140 x 70 mm, this valve is a practical choice for homeowners who want an automated safety layer that integrates seamlessly into their existing security ecosystem.