Ajax WATER STOP-20 W - Secure Two-Way Wireless Remote Control Valve

Ajax WATER STOP-20 W - Secure Two-Way Wireless Remote Control Valve

Remote control water shut-off valve function

This remote-controlled water shut-off valve allows the water supply to be switched off or turned on remotely, via a radio control system. It is designed for integration into technical management or home security systems to intervene quickly in the event of leaks, maintenance or predefined automation scenarios. The valve is operated by an electric motor that mechanically controls the valve, ensuring reliable and reproducible closing without direct manual intervention on the pipework.

Radio communication and data security

Wireless communication is two-way, allowing both the sending of command commands to the valve and the receipt of status information or alerts. Protection against data theft is provided by block encryption using a dynamic key, reducing the risk of unauthorized access or signal manipulation. The tamper alarm complements this security feature by signaling any unauthorized intervention attempts on the device or its installation. The maximum effective radiated power reaches 20 mW, with a radio range of up to 1,100 m depending on the environment and installation conditions.

Components and mechanical design

The device mainly consists of a shut-off valve, an electric actuation motor, as well as a flange and mounting locks for stable attachment to the pipeline. The connection type is a cylindrical female-female BSP thread that complies with EN 10226-1 and ISO 228, which facilitates integration into standardised home or commercial networks. The thread size is 3/4'' (DN 20, 20 mm), suitable for small to medium diameter water pipes commonly used in indoor installations.

Indications, alerts, and automation scenarios

An LED indication provides visual feedback on the operating status of the device, such as power, radio communication, or valve status changes. The device supports automation scenarios, allowing automatic opening or closing to be programmed according to events from a central system or associated sensors, for example in the event of a leak or identified risk. An overheating notification is also provided to signal an exceedance of the permissible internal thermal range, to prevent failures and facilitate preventive maintenance.

Power supply and installation conditions

Power is provided by 4 pre-installed CR123A batteries, simplifying commissioning and avoiding the need for mains wiring for the motorisation and control electronics. The device is designed exclusively for indoor use, which implies protection from the weather to be provided by the installation environment. The operating temperature range is from 0°C to 60°C, which covers most technical rooms and homes, provided that ventilation conditions and distance from sources of excessive heat are respected.

Physical dimensions and weight characteristics

The remote-controlled valve has dimensions of 10.4 cm in height, 14 cm in length and 7 cm in width, allowing compact integration into existing piping networks, even in tight technical spaces. With a weight of 869 g, the device is robust enough to guarantee good mechanical resistance on the waterline, while remaining manoeuvrable during installation and possible maintenance operations. These physical characteristics facilitate its integration into various indoor installation configurations.

Features Ajax WATER STOP-20 W - Secure Two-Way Wireless Remote Control Valve:

• Remote control water shut-off valve
• Wireless
• Two-way communication
• Data Theft Protection
• Block encryption with a dynamic key
• Maximum effective radiated power (ERP): up to 20 mW
• Radio communication range: up to 1,100 m
• Operational Components: Shut-Off Valve, Electric Motor, Flange and Mounting Locks
• Connection type and thread BSP cylindrical (EN 10226-1, ISO 228) female-to-female
• Thread size: 3/4'' (DN 20, 20 mm)
• Indication LED
• Automation scenarios
• Overheating notification
• The device is designed for indoor use only
• Anti-tamper alarm
• Pre-installed batteries: 4x CR123A battery
• Operating temperature: 0°C to 60°C
• Dimensions: 10.4cm x 14cm x 7cm
• Weight: 869g