Ajax WaterStop Jeweller Wireless Water Shutoff Valve, DN15–DN25, 8.5 N·m, 8EU

Introduction: What is the Ajax WaterStop Jeweller?

Ajax WaterStop Jewelleris a wireless, remotely controlled water shutoff valve designed to reduce water damage and add automated control to plumbing systems. The kit pairs a high-quality RuB brass ball valve (available in DN15, DN20 and DN25 sizes) with an electric actuator and Ajax Jeweller radio electronics so the valve can be operated from the Ajax app, a local push-button, or automatically as part of security and automation scenarios. With up to 8.5 N·m of actuator torque and a typical shutoff time of 5–7 seconds, the WaterStop is aimed at homeowners, property managers and commercial sites that need a reliable, fast-response way to isolate water in the event of leaks or planned maintenance.

Key features at a glance

• Remote control:open and close the valve from mobile or PC apps or with the local push-button.
• Automatic shutoff:integrates with Ajax LeaksProtect and third-party detectors for immediate response to leak events.
• Fast close:actuator closes the valve in approximately 5–7 seconds to limit water release.
• High torque actuator:up to 8.5 N·m for dependable operation, even on partially seized valves.
• Battery backup:4 × CR123A batteries preinstalled (typical life up to ~3 years); optional external 9–12 V DC supply available.
• Robust valve body:RuB (Bonomi) brass ball valve with BSP parallel female‑to‑female threads.
• Security oriented:tamper detection and anti‑sabotage options; tool‑free actuator installation and manual lever for emergencies.

Detailed specifications and benefits

• Communication:Jeweller two‑way encrypted radio (GFSK), ERP up to 20 mW; regional frequency bands.
• Radio range:up to 1,100 m line‑of‑sight (environment dependent).
• Shut‑off speed:typical 5–7 seconds.
• Actuator torque:up to 8.5 N·m.
• Operating pressure:up to 10 bar.
• Valve sizes:DN15 (½"), DN20 (¾"), DN25 (1"); BSP parallel female‑to‑female threads (ISO 228 / EN 10226‑1).
• Suitable fluids:cold and hot water and other non‑aggressive liquids (not for gas or aggressive fluids).
• Temperature limits:liquid −20 °C to +170 °C; actuator operating environment 0 °C to +60 °C (avoid freezing conditions).
• Power:4 × CR123A batteries (pre‑installed); optional external 7.5–14 V DC input (recommended 9–12 V DC, 2 A).
• Battery life:up to ~3 years typical, depending on use and radio conditions.
• Form and mounting:actuator and valve sets sized for various pipework (dimensions/weights vary by DN15/DN20/DN25); ISO 5211 compatible mounting standard.
• Other features:LED status indicator, tamper detection, manual lever for emergency shut‑off, tool‑free actuator installation.

• Faster response minimizes damage:The 5–7 second shutoff reduces the total volume of water released in a leak compared with slower motorized valves, which can translate directly into smaller repair bills and less disruption.
• Reliable performance under load:An actuator delivering up to 8.5 N·m of torque can handle valves that are partially seized or need more force to operate, improving long‑term reliability.
• Long battery life and optional external power:Up to three years on batteries under typical use gives peace of mind for remote or hard‑to‑reach installations; the external power input enables uninterrupted supply where desired.
• Secure, resilient communications:The Jeweller protocol is designed for two‑way encrypted communication with long range and low latency, making automation and remote control fast and secure—even on larger properties.
• Built from plumbing‑grade materials:The RuB brass ball valve ensures a durable, serviceable fluid path suitable for domestic and many commercial water applications.
• Fail‑safe physical override:A manual lever allows immediate shutoff without electronics in case of power or electronics failure.

Use cases and scenarios where Ajax WaterStop excels

For homeowners, the most common and immediate benefit is limiting water damage from appliance failures (dishwashers, washing machines) and burst pipes. Automatically linking leak detectors to the WaterStop ensures the household water is isolated as soon as a leak is detected—before water spreads to floors, walls and furnishings.

Properties left unoccupied for long periods are at higher risk of undetected leaks. With battery operation and remote control from the Ajax app, landlords and homeowners can inspect and shut off water from anywhere, or schedule shutoffs during vacancy to reduce risk.

Property managers can reduce liability and maintenance costs by automating water shutoff when sensors detect moisture or when tenants report issues. Fast shutoff minimizes remediation costs and interruption to other tenants.

Small commercial sites such as cafes, salons and offices benefit from quick isolation of water during a failure. Scheduled or remote shutoffs make routine plumbing work simpler and allow teams to de‑energise water lines quickly during maintenance.

The Ajax ecosystem is security‑first; integrating WaterStop into alarm and automation scenarios enables centralized management. For example, the system can automatically turn off water if an intrusion is detected or if environmental sensors signal a problem, integrating water protection into broader safety procedures.

How it compares with similar products on the market

Motorized shutoff valves and smart valves are available across several form factors and connectivity standards (Wi‑Fi, Z‑Wave, Zigbee, proprietary radio). Here is how the Ajax WaterStop stands out and where it differs:

• Connectivity and reliability:Wi‑Fi based valves give convenient cloud control but can be vulnerable to network outages and have higher power draw. Z‑Wave and Zigbee devices are well integrated with general smart home hubs, but range and security depend on the mesh network. Ajax WaterStop uses the Jeweller protocol, optimized for two‑way encrypted communication with long range and low latency, making it especially suitable for security integrated installations and larger properties.
• Battery operation and endurance:Many alternatives require mains power or have shorter battery life. WaterStop’s CR123A battery pack and optional external power provide flexibility—ideal where running mains power is impractical.
• Actuation power and speed:The 8.5 N·m torque and 5–7s close time put WaterStop in the upper range for fast, forceful shutoff among compact, wireless valves—beneficial for quickly stopping flow and managing partially stuck valves.
• Valve quality:The included RuB brass ball valve is a plumbing‑grade component; some cheaper smart valves use plastic internals or less durable connectors, which can affect longevity in demanding installations.
• Limitations:WaterStop is intended for water and non‑aggressive liquids and is not certified for gas. It also requires an Ajax hub (Hub 2, Hub Plus, Hub Hybrid or ReX) to exploit automation scenarios—users looking for a purely Wi‑Fi stand‑alone valve without a hub may prefer other products.

Customer feedback and reviews

While individual reviews vary by market and installer, aggregated feedback from professionals and early adopters highlights several recurring themes:

• Positive:Installers note the straightforward, tool‑free actuator fit and ISO 5211 compatibility, which speeds installation. Homeowners report relief at fast automatic shutoffs that limited damage during real leak incidents. Property managers value the remote control and scheduling features.
• Constructive points:Some users mention that because the device is intended for water only, it isn’t a solution for gas shutoff. Others advise planning for the radio placement and testing signal strength in larger buildings to ensure reliable communication with the Ajax hub.
• Overall sentiment:The WaterStop is commonly described as solidly built and effective at its core purpose—detecting and isolating water leaks quickly to reduce damage and intervention time.

Conclusion: Is the Ajax WaterStop Jeweller the right choice?

For anyone who prioritizes rapid, reliable water isolation—homeowners, landlords, property managers and small commercial operators—the Ajax WaterStop Jeweller is a strong option. Its combination of fast shutoff, high actuator torque, battery backup and secure, long‑range radio connectivity makes it particularly well suited to security‑integrated installations and properties where reliability and automation matter.

Key strengths are the plumbing‑grade RuB ball valve, the actuator’s force and speed, and the resilience of the Jeweller communication protocol. Limitations are straightforward: it’s designed for water and non‑aggressive liquids only, requires an Ajax hub for full automation capabilities, and must be installed in accordance with local plumbing codes and the product manual.

If your priority is to reduce water damage and add a dependable automated shutoff that integrates into a broader security and automation system, the Ajax WaterStop Jeweller is a compelling choice. For pricing and official certification details, consult the manufacturer or authorized distributors—prices and warranty information may vary by region and reseller.