Ajax WaterStop 3/4" (DN 20) Jeweller wireless water shut-off valve
Wireless 3/4" water shut-off valve that can automatically close the water supply in up to 7 seconds.
- 3/4" valve for hot and cold water
- Closes the water in up to 7 seconds
- Can be activated automatically when a water leak is detected
- Remote control and status display in Ajax apps
- Battery life of up to 3 years
- Wireless range of up to 1,100 meters
- Option for external power supply
- IP66 protection against dust and water
Ajax WaterStop 3/4" (DN 20) Jeweller is a wireless water shut-off valve that helps limit water damage in homes and businesses. Together with an Ajax LeaksProtect or a compatible leak sensor, the valve can automatically shut off the water supply when water is detected.
| Technical specifications | |
| Model | Ajax WaterStop ¾" (DN 20) Jeweller |
| Product type | Wireless remotely controlled water shutoff valve |
| Communication technology | Jeweller encrypted two-way wireless communication |
| Wireless range | Up to 1,100 m (open space) |
| Radio frequency | Depends on region (868 MHz / 915 MHz variants) |
| Maximum radio output power | Up to 20 mW ERP |
| Valve size | ¾" (DN 20) |
| Valve material | Brass |
| Connection type | BSP parallel female-to-female thread (EN 10226-1 / ISO 228) |
| Operating medium | Hot and cold water and other non-aggressive liquids |
| Operating liquid temperature | -20°C to +170°C |
| Maximum operating pressure | Up to 10 bar |
| Actuator torque | Up to 8.5 Nm |
| Valve operating time | Up to 7 seconds |
| Control methods | Ajax app, manual control button and automation scenarios |
| Automation support | Alarm reactions, security mode changes, schedules, temperature, humidity, CO₂, Button and LightSwitch scenarios |
| Tamper protection | Device authentication, tamper alarm and anti-sabotage mounting lock |
| Communication loss detection | 36 seconds (depending on Jeweller settings) |
| Power supply | 4 × CR123A batteries (up to 3 years) or optional 7.5–14 VDC external power supply |
| Operating temperature | 0°C to +60°C |
| Operating humidity | Up to 95% |
| Protection rating | IP66 |
| Dimensions | 104 × 150 × 70 mm (with actuator) |
| Weight | 1012 g (complete unit) |
| Available colours | Black and White |
| Der tages forbehold for eventuelle fejl og ændringer i specifikationerne / Specifications are subject to change without notice. Errors and omissions excepted. | |
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Here you can see the compatibility between the various units and Hubs from Ajax
https://ajax.systems/tools/devices-compatibility/
3/4" water shut-off valve with automatic leak protection
The valve is suitable for installations where the water supply needs to be shut off quickly in the event of a leak. It can be used on pipes for both hot and cold water and closes the water in up to 7 seconds under normal conditions.
Automatically limits water damage
When a connected LeaksProtect detects water, the Ajax system can automatically send a signal to WaterStop and close the valve. This makes it possible to respond to a leak even when the building is empty or the residents are asleep.
Control the water from the Ajax app
The water supply can be opened and closed directly from the Ajax app. Here you can also see the valve’s current position, battery level, connection to the hub, and the status of any external power supply.
Automation based on your needs
WaterStop can be part of automation scenarios and, for example, shut off the water during an alarm, at specific times, or when the alarm system is armed or disarmed. This makes it possible to adapt the water supply to the building’s daily use.
Works even during a power outage
The unit comes with four CR123A batteries and can operate for up to three years without a fixed power connection. An external power supply can also be connected, with the batteries acting as backup.
Manual operation when needed
The valve can be opened and closed using the button on the motor unit. The mounting platform also has a handle that makes it possible to operate the valve manually when the motor unit is removed.
Flexible installation
The motor unit can be mounted in four different positions, so the installation can be adapted to the piping layout and the space around the valve. The motor unit can also be removed without taking the valve out of the pipe system.
Protection against unauthorized removal
Both a standard lock and a tamper-protected lock are included for securing the motor unit. The built-in tamper switch can send a notification if the motor unit is removed from the valve.
For indoor installation only
Ajax WaterStop is designed for indoor use. The shut-off valve itself should be installed by an authorized or qualified plumbing installer.
Compatibility
Compatible Ajax accessories can be found under the Accessories tab.
Key technical points
- Model: Ajax WaterStop 3/4" (DN 20) Jeweller
- Valve size: 3/4" (DN 20)
- Use: Water supply and heating systems
- Suitable for hot and cold water as well as non-aggressive liquids
- Valve material: Brass
- Valve type: female-to-female thread
- Closing time: Up to 7 seconds
- Torque: Up to 8.5 Nm
- Operating pressure: Up to 10 bar
- Remote control via Ajax apps
- Manual control via button and handle
- Jeweller wireless communication
- Wireless range: Up to 1,100 meters in open space
- Four possible mounting positions
- Automation scenarios
- Overheating warning
- Tamper switch
- Four included CR123A batteries
- Battery life: Up to 3 years
- Option for external power supply at 7.5-14 V DC
- Operating temperature for the motor unit: 0 °C to 60 °C
- IP66
- Colors: Black or white
- Warranty: 24 months
