---
product_id: 46162760
title: "Water Leak Sensor Detector, 120dB, 37.8 Inches Cable, 3 Packs | Flood Alarm for Basement, Under Sink, Sump Pump, RV, Kitchen, Water Heater, Apartment Management, Moisture, Battery Operated"
brand: "topvico"
price: "€ 32.70"
currency: EUR
in_stock: true
reviews_count: 13
category: "Topvico"
url: https://www.desertcart.pt/products/46162760-water-leak-sensor-detector-120db-37-8-inches-cable-3
store_origin: PT
region: Portugal
---

# 37.8-inch extended cable 120dB ultra-loud alarm 2-year battery standby Water Leak Sensor Detector, 120dB, 37.8 Inches Cable, 3 Packs | Flood Alarm for Basement, Under Sink, Sump Pump, RV, Kitchen, Water Heater, Apartment Management, Moisture, Battery Operated

**Brand:** topvico
**Price:** € 32.70
**Availability:** ✅ In Stock

## Summary

> 💧 Stay dry, stay ahead—leak alerts that never sleep!

## Quick Answers

- **What is this?** Water Leak Sensor Detector, 120dB, 37.8 Inches Cable, 3 Packs | Flood Alarm for Basement, Under Sink, Sump Pump, RV, Kitchen, Water Heater, Apartment Management, Moisture, Battery Operated by topvico
- **How much does it cost?** € 32.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/46162760-water-leak-sensor-detector-120db-37-8-inches-cable-3)

## Best For

- topvico enthusiasts

## Why This Product

- Trusted topvico brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Instant 120dB Alert:** Hear it loud and clear—never miss a leak, even from the basement.
- • **Flexible 37.8" Cable:** Reach those hidden leak spots with ease, extendable up to 150 feet.
- • **Effortless Dual Mounting:** Stick or mount your way—perfect for RVs, kitchens, basements, and more.
- • **Long-Lasting Battery Life:** Up to 2 years standby on a single 9V alkaline battery—set it and forget it.
- • **Premium 24K Plated Sensor:** Super-sensitive detection that triggers at the slightest moisture touch.

## Overview

The Topvico Water Leak Sensor Detector 3-pack features a piercing 120dB alarm and a highly sensitive 24K plated sensor board for early water leak detection. With a 37.8-inch cable extendable up to 150 feet, it covers hard-to-reach areas like basements, kitchens, and RVs. Easy dual mounting options and a low-power design provide up to 2 years of battery standby, making it a reliable, cost-effective solution to prevent costly water damage.

## Description

Topvico Water Leak Sensor Detector, 120dB, 37.8 Inches Cable, 3 Packs | Flood Alarm for Basement, Under Sink, Sump Pump, RV, Kitchen, Water Heater, Apartment Management, Moisture, Battery Operated - desertcart.com

Review: Low Budget Cost but Effective! - For the second time in 10 years, our dishwasher had a slow leak that eventually led to noticeably cupped hardwood flooring. Ughh. After replacing the hose fitting, I decided to install some sort of early warning leak detection system to prevent these slow, floor-soaking events from happening again. I started out thinking "high end, WIFI, Apple compatible etc. and even ordered one. After receipt, I found out I needed a special app that I didn't have and didn't want, so I returned it unopened. I then decided to take the dirt-cheap approach and purchased 3 of these for $15. After receipt, I remember installing a battery to test one and began wondering if I could do so without breaking it. They are not tough, solid, bullet-proof, and robust. They have a "low cost" character to them (no surprise). But they are good enough for normal handling and care. However, much to my delight, I found out that simply touching their sensor with a damp q-tip swab was enough to set them off. Yeah! I have seen too many videos of people pouring a cup of water on a sensor to show that they work. These low cost devices are VERY SENSITIVE! Plus, they are old school (reliable) hard wired so no need for wifi headaches. Plenty Loud too. I needed to extend the wires, which was easily done with solder and heat shrink tubing. So now I have two redundant systems. One goes to a small plastic cup under the problematic hose fitting to the dish washer, and the other is attached to the flooring just behind the dishwasher. The two alarm units are mounted under the kitchen sink. My plan is to replace batteries on a rotating 3 month schedule and to load test the removed batteries to build confidence in what their life actually is, then lengthen replacement life as I safely can. Not fancy. Not expensive. No more damaged hardwood floors. Met my needs!
Review: Water sensor - Very loud and sensitive - works well

## Features

- Loud 120dB Alarm for Immediate Alerts: The powerful 120dB alarm notifies you as soon as a leak is detected. The alarm continues until the water dries or the sensor is turned off, ensuring you don't miss a potential flood, even from the basement. A cost-effective solution to prevent water damage in homes and businesses
- High-Sensitivity 24K Plated Sensor: Equipped with a premium 24K plated detection board for maximum sensitivity (if you no need high sensitivity, please try "B0BYHS79W5" with similar cost). Designed for repeated use - simply dry the sensor board after activation, and it's ready to use again
- Upgraded Easy Installation with Dual Mounting Options: Features a double-sided adhesive sticker for effortless installation. One part secures the alarm unit, while the other attaches the water detection board. Choose from two mounting styles, as shown in the product images, to best fit your needs. Suitable for install in RV, fixed well with stickers, not move when driving
- Extended Cable Length for Hard-to-Reach Areas: Comes with a 37.8-inch cable, easily extendable by the user up to over 150 feet using standard electrical wire (wire not included). Designed to detect water in hard-to-reach corners, suitable for monitoring rising water levels in sump pumps. Suitable for use in basements, near water heaters, underground spaces, washing machines, kitchens, RVs, and more
- Battery-Powered with Maximum Efficiency: Equipped with upgraded low-power circuitry, standby mode for up to 2 Years with a standard 9V alkaline battery (not included). Our optimized energy-saving technology ensures minimal power draw when not triggered, reliable protection with fewer battery changes. We recommend using a quality brand-name alkaline battery for consistent, optimal performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07311Z536 |
| Audible Noise | 120 db |
| Battery Description | Alkaline |
| Best Sellers Rank | #24,643 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #24 in Water Detectors & Alarms |
| Brand | Topvico |
| Built-In Media | Water detect board |
| Color | White |
| Control Method | App |
| Customer Reviews | 4.5 out of 5 stars 1,877 Reviews |
| Item Dimensions L x W x H | 3.82"L x 1.77"W x 0.87"H |
| Item Weight | 1.76 ounces |
| Manufacturer | Topvico |
| Manufacturer Warranty Description | 24 months |
| Maximum Range | 150 feet |
| Mfr Part Number | TP-206W |
| Model Number | TP-206W-3 |
| Mounting Type | Floor Mount |
| Number of Batteries | 1 9V batteries required. |
| Power Source | Battery Powered |
| Product Dimensions | 3.82"L x 1.77"W x 0.87"H |
| Sensor Technology | Water Detection Sensor |
| Size | 3 Pack (120dB/37.8" Cable) |
| UPC | 603894417086 |
| Unit Count | 3 Count |
| Voltage | 9 volts |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** Topvico
- **Color:** White
- **Power Source:** Battery Powered
- **Product Dimensions:** 3.82"L x 1.77"W x 0.87"H

## Images

![Water Leak Sensor Detector, 120dB, 37.8 Inches Cable, 3 Packs | Flood Alarm for Basement, Under Sink, Sump Pump, RV, Kitchen, Water Heater, Apartment Management, Moisture, Battery Operated - Image 1](https://m.media-amazon.com/images/I/61D1ty6YU7L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Low Budget Cost but Effective!
*by M***P on June 21, 2025*

For the second time in 10 years, our dishwasher had a slow leak that eventually led to noticeably cupped hardwood flooring. Ughh. After replacing the hose fitting, I decided to install some sort of early warning leak detection system to prevent these slow, floor-soaking events from happening again. I started out thinking "high end, WIFI, Apple compatible etc. and even ordered one. After receipt, I found out I needed a special app that I didn't have and didn't want, so I returned it unopened. I then decided to take the dirt-cheap approach and purchased 3 of these for $15. After receipt, I remember installing a battery to test one and began wondering if I could do so without breaking it. They are not tough, solid, bullet-proof, and robust. They have a "low cost" character to them (no surprise). But they are good enough for normal handling and care. However, much to my delight, I found out that simply touching their sensor with a damp q-tip swab was enough to set them off. Yeah! I have seen too many videos of people pouring a cup of water on a sensor to show that they work. These low cost devices are VERY SENSITIVE! Plus, they are old school (reliable) hard wired so no need for wifi headaches. Plenty Loud too. I needed to extend the wires, which was easily done with solder and heat shrink tubing. So now I have two redundant systems. One goes to a small plastic cup under the problematic hose fitting to the dish washer, and the other is attached to the flooring just behind the dishwasher. The two alarm units are mounted under the kitchen sink. My plan is to replace batteries on a rotating 3 month schedule and to load test the removed batteries to build confidence in what their life actually is, then lengthen replacement life as I safely can. Not fancy. Not expensive. No more damaged hardwood floors. Met my needs!

### ⭐⭐⭐⭐⭐ Water sensor
*by A***R on June 27, 2026*

Very loud and sensitive - works well

### ⭐⭐⭐⭐ water leakage alarms
*by K***E on July 13, 2026*

worked fine. I did have to lengthen the wires

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-08-05*