# iSpring LS43 Leak Detector with Automatic Shut-Off Valve

The iSpring LS43 water leak detector system combines two sensors with an automatic shut-off valve for whole-house water-line monitoring. Its controller supports up to eight sensors, while installation requires fitting a valve to the water pipe and access to a power outlet.

- [Original product page](https://best-deals.pro/product/ispring-ls43-water-leak-detector-automatic-shutoff)
- [View offer](https://best-deals.pro/visit/ispring-ls43-water-leak-detector-automatic-shutoff)
- Market: US
- Language: en-US
- Currency: USD
- Brand: iSpring
- Model: LS43
- Category: Tools & Garden > Electrical & Plumbing
- Price: 120.99 USD
- Previous price: 149.99 USD
- Discount: 19%
- Price checked: 2026-11-14T07:08:37.498Z
- Rating: 4.6 / 5
- Reviews: 69

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Automatically shuts off the water supply when a sensor detects possible leakage, according to the listing.
- The controller supports up to eight water detection sensors, with two included.
- A sound and light alarm and controller indicators are described for alerts.
- The listing specifies a 3/4-inch NPT automatic shut-off ball valve.

## Pros

- Automatic valve closure can limit water flow after a sensor detects a possible leak.
- Two included sensors provide more than one detection point, and the controller can support additional sensors up to eight total.
- Sound and light alerts can warn people nearby while the valve closes.

## Cons

- Installing the valve involves cutting into the water pipe, and pipe-specific couplers or joining materials may be needed but are not included, according to the installation instructions.

## Specifications

### Identity
- Brand: iSpring
- Model: LS43
### Dimensions and installation
- Dimensions listed: 4.5"L x 1"W x 3"H
- Weight listed: 1.1 pounds
- Valve connection: ¾’’ NPT
- Controller module cable: 3 feet
- Transformer cable: 6 feet
- Water sensor cable: 20 feet
### Detection and control
- Sensors included: 2 sensors
- Maximum connected sensors: 8 water detection sensors
- Alarm: Sound/light alarm
- Power supply: 5V / 1A Transformer

## Before you buy

- The valve must be installed on the water line, and the controller requires a nearby power outlet. Sensor placement near areas likely to contact leaking water affects coverage. The listing describes pipe-cutting work and says couplers or sweat-joint materials may be needed depending on the pipe type, but does not include them in the stated box contents.

## A good fit for

- Homeowners seeking a wired leak-detection system that can shut off a water line automatically.
- Buyers who want to monitor multiple leak-prone locations using two included sensors and the option to connect more.

## Less suited to

- Renters or buyers who cannot modify the water pipe or provide a nearby power outlet.
- Anyone seeking a portable, battery-powered, or wireless leak alarm. The listing describes a transformer-powered controller and wired sensor cables.

## Customer feedback

Customer feedback describes the system as reliable and effective for whole-home leak protection, including a report of the main water supply cutting off when a leak was detected. Buyers also comment positively on quality and value. For a home where an automatic response matters, those impressions relate to the listed shut-off valve and multi-sensor controller, but they do not establish performance in every installation.
- Positive themes: Customer feedback highlights perceived reliability and quality.
- Positive themes: Customers describe the system positively for leak protection and value.

## Frequently asked questions

### Does the LS43 shut off water automatically?
The listing says the valve automatically shuts off the water supply when a sensor detects a possible leak.
### How many sensors are included, and how many can connect?
Two sensors are listed as included. The controller is described as supporting up to eight sensors.
### What should I know about installation?
The valve is installed on the water pipe and the instructions describe cutting the pipe. The controller needs a power outlet. Depending on the pipe type, couplers or sweat-joint materials may be needed and are not included.
### Does it provide an audible alert?
The listing describes a sound and light alarm and says the controller has indicators that identify which sensor detected water.

## Offer details

- The listing states a 1-year warranty with lifetime support from iSpring.

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## Add-ons

- [iSpring ASLS43 Water Leak Detector Alarm System Add-on Detection Sensor \| Wired add-on for LS43.](https://best-deals.pro/visit/ispring-ls43-water-leak-detector-automatic-shutoff)

## Images

![iSpring LS43 Leak Detector with Automatic Shut-Off Valve — 1](https://best-deals.pro/i/7lFgVH1ag0D1RwGQe2C9patdchRy_cOGuOkGS8A75qrh-no2q_8ZCrk1avxn_Lg16VrDQ6Ayh7ovJppTMaGdWvN6XLlXMhEfPxH_sFE_IRrbAPTFA8npEjCd.jpg)

![iSpring LS43 Leak Detector with Automatic Shut-Off Valve — 2](https://best-deals.pro/i/DfUqvtpX7m7as2UlMvWU76-Ed_KbFMRjfRqWdzSfkyLFOo2zxmseRk7k3eD3S6sZe6HO8I3932tnRaoNdoisOwhhgqr0iFmHBhNblgrZDZ6XWxUOgLBqFAMI.jpg)

![iSpring LS43 Leak Detector with Automatic Shut-Off Valve — 3](https://best-deals.pro/i/ilPWuolvuscTlUoqYdbm-_ef2gMEcERITK42wsNjNzQ8dqGCTvK7kz9IF1rNkkkqY1TiDVuwkOQt1xoqK5jrQqNw-1tH8RA5c6_RMzKwA2Cdf9I3ysGjHaMW.jpg)

![iSpring LS43 Leak Detector with Automatic Shut-Off Valve — 4](https://best-deals.pro/i/6JDbGfbO3DAPrjwaimxn7tj-Bk7NhggslHzo6WsJKPPtUfloULeuWpi2wgArHSNdwthw8Chq-_G824uhBx-oV5vS02YrHR5fSIGiOAw9JxFipHeWWy4sY_iC.jpg)

![iSpring LS43 Leak Detector with Automatic Shut-Off Valve — 5](https://best-deals.pro/i/cWVo_FxxynZSkTGaCWjYG093CanTJnRgSCAy5XgF0gF6VtAYMNM79vi79IIF2qHAMs3QWeAOcWf1V_87-oEA6TYYpUQ7xWLniFfrclQxTzaYAUJwcx3B-eUq.jpg)

![iSpring LS43 Leak Detector with Automatic Shut-Off Valve — 6](https://best-deals.pro/i/ZFw7W43tzwDTESnKx8RQDDZoDxj7flYx1QhKvNFdaNNlVcbWpmorRlkoC_J3HJ1XyP8rNKLF0kbdP8g7XGHsC1KshxfmPRsgEhvDICzOalF9kyeLp6L1fxAR.jpg)