--- product_id: 212137427 title: "Water Switch, 1pc AC 220V 3A Plastic Magnetic Water Switch Vertical/Horizontal Water Control Sensor with G1/2\" (BSP) Pipe for Electric Water Heater" brand: "keenso" price: "€ 21.54" currency: EUR in_stock: true reviews_count: 3 category: "Keenso" url: https://www.desertcart.sk/products/212137427-water-switch-1pc-ac-220v-3a-plastic-magnetic-water-switch store_origin: SK region: Slovakia --- # 220V AC power for instant activation Magnetic repulsion tech for reliable switching G1/2" BSP threaded pipe for universal fit Water Switch, 1pc AC 220V 3A Plastic Magnetic Water Switch Vertical/Horizontal Water Control Sensor with G1/2" (BSP) Pipe for Electric Water Heater **Brand:** keenso **Price:** € 21.54 **Availability:** ✅ In Stock ## Summary > 💧 Switch smart, save energy, and stay effortlessly efficient! ## Quick Answers - **What is this?** Water Switch, 1pc AC 220V 3A Plastic Magnetic Water Switch Vertical/Horizontal Water Control Sensor with G1/2" (BSP) Pipe for Electric Water Heater by keenso - **How much does it cost?** € 21.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/212137427-water-switch-1pc-ac-220v-3a-plastic-magnetic-water-switch) ## Best For - keenso enthusiasts ## Why This Product - Trusted keenso brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** High-quality plastic construction guarantees long service life and dependable performance. - • **Peace of Mind Warranty:** Backed by a 180-day warranty to keep your system running worry-free. - • **Universal Compatibility:** Standard G1/2" BSP threading fits most electric water heaters for easy installation. - • **Effortless Energy Savings:** Automatically powers your water heater only when water flows, cutting unnecessary electricity use. - • **Magnetic Precision Switch:** Spring-free magnetic repulsion ensures smooth, durable operation without scale buildup. ## Overview The Keenso EFS-04P Water Switch is a 220V, 3A magnetic flow sensor designed for electric water heaters. Featuring a spring-free magnetic repulsion mechanism, it reliably activates the heater only when water flows, promoting energy savings and reducing scale buildup. With a universal G1/2" BSP threaded connection and durable plastic build, it offers easy installation and long-lasting performance, backed by a 180-day warranty. ## Description Water Switch, 1pc AC 220V 3A Plastic Magnetic Water Switch Vertical/Horizontal Water Control Sensor with G1/2" (BSP) Pipe for Electric Water Heater : desertcart.co.uk: Business, Industry & Science Review: excellent & great value - excellent & great value Review: Not as specified - I used this device to switch a bathroom extractor fan on. Contacts keep sticking leading to continuous running of the fan. Giving the benefit of doubt I replaced my old fan and bought a replacement switch and got the same result. Contacts can be freed by giving the device body a sharp tap , so the contacts are sticking under load conditions.The switch on current of the fan is around 40mA (far less than the specified I max of 3A) Conclusion not as specified. ## Features - Excellent Performance: This 220V water flow switch adopts magnet repulsion instead of springs, which is safe and reliable. It can make water is not easy to scale, which is conducive to health. Pipe thread size: G1/2" (BSP); diameter: 2cm. - Scope of Application: This 220V 10W water flow switch can be used in the instantaneous electric water heater, which can save electricity power. - Premium Quality: This brand new water flow switch is made of high quality material, which is sturdy and durable in use. And it can be used for a long time, which has long service life and good reliability. - Function Introduction: When there is a certain water flow through inlet, electric circuits is connected and water heater begin to heat. When the water flow stops, the water heater stops working, which is a very important part in the instant water heater. - Guarantee: Our EFS-04P water flow switch has 180 days warranty, if you have any question about this product, please feel free to contact us, we will try our best to help you solve your problem. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07TYWF668 | | Best Sellers Rank | 28,640 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 9 in Flow Sensors | | Brand | Keenso | | Circuit Type | 1-way | | Connectivity Protocol | Wi-Fi | | Connector Type | Threaded | | Contact Material | Plastic | | Contact Type | Normally Open | | Control Method | App | | Controller Type | Mechanical knob | | Country Of Origin | China | | Current Rating | 3 Amps | | Customer Reviews | 3.5 3.5 out of 5 stars (11) | | Lower Temperature Rating | 1 Degrees Celsius | | Manufacturer | Keenso | | Material | Plastic | | Model Number | EFS-04P | | Mounting Type | Wall Mount | | Number of Items | 1 | | Number of Positions | 1 | | Operating Voltage | 220 Volts | | Operation Mode | ON-OFF | | Switch Type | Flow Switch | | Terminal | Screw | | UPC | 707300318070 | | Unit Count | 1.0 count | | Wattage | 10 watts | ## Product Details - **Brand:** Keenso - **Circuit type:** 1-way - **Connector type:** Threaded - **Contact type:** Normally Open - **Current rating:** 3 Amps - **Material:** Plastic - **Operating voltage:** 220 Volts - **Operation mode:** ON-OFF - **Switch type:** Flow Switch - **Terminal:** Screw ## Images ![Water Switch, 1pc AC 220V 3A Plastic Magnetic Water Switch Vertical/Horizontal Water Control Sensor with G1/2" (BSP) Pipe for Electric Water Heater - Image 1](https://m.media-amazon.com/images/I/41WmeGqFcfL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ excellent & great value *by G***. on 15 January 2026* excellent & great value ### ⭐ Not as specified *by T***E on 22 July 2025* I used this device to switch a bathroom extractor fan on. Contacts keep sticking leading to continuous running of the fan. Giving the benefit of doubt I replaced my old fan and bought a replacement switch and got the same result. Contacts can be freed by giving the device body a sharp tap , so the contacts are sticking under load conditions.The switch on current of the fan is around 40mA (far less than the specified I max of 3A) Conclusion not as specified. ### ⭐ Worked fine to 2 weeks *by N***D on 29 November 2024* Worked well for about 2 weeks then it became slow to turn on and off. I was using it on the hot water flow to an under sink heater to turn a pressure booster on and off. This was wired via a relay to ensure the switching current was low. ## Frequently Bought Together - Water Flow Switch, 1pc AC 220V 3A Plastic Magnetic Water Flow Switch Vertical/Horizontal Water Flow Control Sensor with G1/2" (BSP) Pipe for Electric Water Heater - AZDelivery 5PCS DS18B20 3M Cable Digital Temperature Thermal Waterproof Probe Sensor -55°C to +125°C compatible with Arduino and Raspberry Pi including E-Book! - Shelly Plus Add-On | Add-On for Shelly Plus & Gen3 Devices | Temperature and Humidity Sensor Interface | Home Automation | DS18B20, DHT22 & Arduino Sensors | Analog and Digital Input | No Hub Required --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/212137427-water-switch-1pc-ac-220v-3a-plastic-magnetic-water-switch](https://www.desertcart.sk/products/212137427-water-switch-1pc-ac-220v-3a-plastic-magnetic-water-switch) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-12*