Ajax WaterStop WL 3/4" (DN20) White Wireless Water Shut-Off Valve

Ajax WaterStop WL 3/4" (DN20) White Wireless Water Shut-Off Valve

The Ajax WaterStop is a smart, remotely controlled water shutoff valve designed to work as part of an Ajax security and automation system. Built around a robust 3/4" (DN20) valve body finished in white, it pairs a high-quality shutoff valve with a powerful electric actuator that can close the water supply automatically the moment a leak is detected, or on command from anywhere with an internet connection. It communicates with an Ajax hub over the encrypted, long-range Jeweller radio protocol, making it a reliable backbone for flood prevention in homes, offices, retail spaces and light commercial sites.

Key Features

• Fast automatic shutoff: Closes the water supply within seconds of receiving a command or a triggered leak alarm from an Ajax LeaksProtect sensor or compatible third-party detector.
• Long wireless range: Communicates with the Ajax hub over the Jeweller radio protocol at distances of up to roughly 1,100 metres in open space.
• Battery and mains options: Runs on 4 pre-installed CR123A batteries for up to 3 years of use, with an optional external 9-12V power supply for continuous operation.
• Powerful actuator: The electric actuator delivers strong torque, enough to shift even a stuck or seized valve without causing damage.
• Durable, weatherproof build: IP66-rated enclosure shields the electronics from dust and moisture, suiting installation in basements, utility rooms and tight pipe runs.
• Flexible mounting: The actuator can be fitted in four different orientations relative to the valve, and can be serviced or swapped without dismantling the valve itself.
• Tamper resistance: An anti-sabotage locker helps prevent unauthorised removal of the electric actuator.
• Manual and app control: Water can be turned on or off using the physical button/lever, or remotely and instantly through the Ajax mobile and desktop apps.
• Automation scenarios: Configure the valve to close automatically based on leak alarms, arming/disarming events, schedules, or other Ajax devices.

Typical Applications

WaterStop WL is ideal for homeowners, landlords and facility managers who want an automated first line of defence against burst pipes, appliance leaks or plumbing failures. Because it works with hot and cold water lines and integrates directly into an existing Ajax security setup, it is well suited to residential properties, holiday homes, apartment blocks, offices, cafes and retail premises where water damage could otherwise go unnoticed for hours.

What's in the Box

• Ajax WaterStop electric actuator (white)
• 3/4" (DN20) shutoff valve
• 4x CR123A batteries (pre-installed)
• Mounting lockers (standard and anti-sabotage)
• Sealing nut
• Quick start guide

Frequently Asked Questions

Does WaterStop need an Ajax hub to work? Yes, it operates as part of an Ajax security system and requires an Ajax hub for configuration, remote control and automation scenarios.

Can it be used on hot water pipes? Yes, the valve is rated for both hot and cold water supply lines.

What happens if the batteries run low or fail? The device reports battery status through the Ajax app, and an optional external power supply can be connected for continuous, battery-free operation.

Additional Resources

• More info