# Ajax WaterStop Wireless Water Leak Detector RF Wireless 866-922 MHz

**URL:** https://aio.lv/en/product--ajax-52271146wh1--11565377
**Data updated:** 2025-12-31 08:43 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** Ajax
**Manufacturer code:** 52271.146.WH1
**EAN:** 4823114030987
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 249.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 206.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ajax-52271146wh1--11565377

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.89 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

Ajax WaterStop Wireless is a water leak detector that operates on RF wireless technology at a frequency of 866-922 MHz. It is powered by a CR123A battery and features a compact design with dimensions of 70 mm width, 104 mm depth, and 140 mm height. This device is essential for early detection of water leaks, helping to prevent damage and costly repairs.

## Long description

Ajax WaterStop Wireless combines a high‑quality ball‑valve actuator with RF wireless communication to automatically shut off water within seconds when a leak is detected. Designed for integration with an Ajax security system, WaterStop works with Ajax LeaksProtect and compatible third‑party detectors to stop water flow remotely via the Ajax apps or automatically by scenario. The device is battery powered with an option for an external 9–12 V⎓ supply, fits common valve sizes, and supports secure two‑way radio communication over the Jeweller protocol.
Advantages
WaterStop closes the water supply in about 5 seconds using a powerful electric actuator (up to 8.5 N·m torque), limiting leak volume even under typical pressure. It supports ½", ¾" and 1" valve sizes (DN 15, DN 20, DN 25) and is compatible with ISO 5211 flanges, allowing installers to use market‑available ball valves. The unit is wireless and battery‑powered (replaceable CR123A cells), offers an optional external 9–12 V⎓ input for continuous operation, and provides overheating and overcurrent protection for reliable actuator performance. Secure, long‑range Jeweller radio ensures stable communication, while system features like ReX extenders, in‑app control, detailed event logs and remote configuration simplify installation, monitoring and maintenance.
Suitable for
Residential apartments and houses
Small commercial premises and offices
Basements, storage rooms and technical spaces
Properties requiring remote water shutoff and automation
Key specifications
Wireless frequency: 866–922 MHz (Jeweller protocol)
Actuator torque: up to 8.5 N·m
Valve compatibility: ISO 5211; available sizes ½" (DN15), ¾" (DN20), 1" (DN25)
Power supply: replaceable batteries (CR123A), 3‑year typical battery life; optional external 9–12 V⎓ input
Dimensions (actuator unit): 70 mm × 104 mm × 140 mm
Event log capacity: 500 recent events
Range (open space): up to 1,100 m (depending on environment)
How to use
Install a compatible ball valve in line with the existing plumbing and mount the WaterStop actuator on the valve’s ISO 5211 flange in one of four possible orientations. Insert the replaceable batteries or connect an optional 9–12 V⎓ power supply if continuous operation is required. Add WaterStop to the Ajax hub using the Ajax app, configure scenarios or automatic reactions to LeaksProtect or third‑party detectors, and test the system. From the app you can remotely check status, close or open the valve and receive notifications about events or low battery.
Usage recommendations
For reliable operation, use compatible ISO 5211 ball valves of the specified sizes and replace batteries every three years or sooner if the app notifies low charge; consider connecting an external 9–12 V⎓ supply in locations with extreme temperatures or where frequent actuator use is expected. Use ReX extenders when installing in locations with complex radio conditions to ensure stable communication.

## Specifications

| Feature | Value |
|---|---|
| Weight | 1.012 kg |
| Compatibility | Hub Plus, Hub 2 (2G), Hub 2 (4G), Hub 2 Plus, Hub Hybrid (2G), Hub Hybrid (4G), Rex, Rex 2 |
| Battery type | CR123A |
| Wireless technology | RF Wireless |
| Operating temperature (T-T) | 0 - 60 |
| Number of batteries supported | 4 |
| Power source | Battery |
| Height | 140 mm |
| Width | 70 mm |
| Depth | 104 mm |
| Connectivity technology | Wireless |
| Product colour | White |
| Operating frequency | 866 - 922 |
| Battery life | 3 year(s) |
| Battery voltage | 14 V |
| Batteries included | Yes |
| Transmission distance | 1100 m |
| Maximum water pressure | 10 bar |
| Quantity per pack | 1 pc(s) |
| Maximum water temperature | 170 °C |
| Outlet hose diameter | 0.5 " |
| Adjustable water flow control | Yes |

## FAQ

### How much does the Ajax WaterStop Wireless Water Leak Detector cost, and is it available for purchase?

The price is 249.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Ajax WaterStop Wireless Water Leak Detector be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Ajax products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Ajax service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11565377/66586296_large.webp