Prevent leaks on your construction site

The Avoidance of Water Damage on Construction Sites has never been more important.

We help you adhere to the CIREG best practice on managing escape of water risk.

  • Leaks Caught Fast with Smart Shut-off Valves
  • Prevent Water Damage
  • Lower Insurance Premiums
Quensus - Intelligent Water Management

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62% of construction sites will report water damages

Large losses from escape of water on construction sites are now more frequent than fire related incidents. Higher premiums, higher deductibles and loss of cover are increasingly common for sites with no protection.

£193m per year

total Escape of Water claims for commercial insurance.

A leak ooccurs every 10 minutes!

£55,000 average claim

due to water damages on construction sites, but can exceed £1,000,000.

5.6x lower chance of claiming with tech

An average site has 62% chance of claiming. With smart leak detection, this lowers to only 11%.

We are here to help you adhere to CIREG Best Practice

According to Best Practice Guidance, a Water Management Plan for the temporary water supply and permanent works water systems should be made before works commence. The full specification can be found here, but briefly includes:

  • Management - nominate a Responsible Person to be overseen by the Principal Contractor.
  • Design Considerations - planned installation of automatic flow monitoring and automatic shutoff devices in the operational building to improve the availability of insurance.
  • Installation Standards - compliance with the Water Supply (Water Fittings) Regulations 1999, BS EN 806, BESA Good Practice Guides, CIBSE standards, and CIPHE plumbing engineering design guide.
  • Quality Management - Only qualified, competent plumbing engineers should be permitted to work on water distribution systems with at least a Level 3 NVQ, CSCS card, and affiliation to CIPHE (or similar).
  • Testing and Commissioning Standards
  • Emergency Response - detailing clear and simple procedures to isolate the water supply and remove the risk.
  • Mitigation - by installing Automatic Flow Monitoring with Smart Shut-off Valves such as LeakNet.


The Most VersatileMost EffectiveComplete Leak Detection Solution

Rapidly Detect Leaks

Complete water management with intelligence which immediately shuts the water off to prevent damages.

Temporary supply

Isolate the supply outside working hours and weekends when the building is unattended.

Autonomous operation

Learns normal water usage over time and shuts off the supply if flow becomes abnormal.

Permanent supply

Beneficial to contractors and managing agents. Remain fully operable before and after handover.

Grouping functionality

Split complex buildings by floor or zone to easily identify leaks and isolate individual or multiple areas at once.

Any size pipe

Monitor and control water anywhere such as booster pump sets, irrigation and automatic refill systems.

Many to Many Alerts

Alerts from multiple systems can be sent to multiple appointed persons by email, SMS, as well as to a BMS.

Splash Sensors

No need to plumb, wirelessly detect pooling water in risers and plant rooms for added protection.

And much, much more

Realtime monitoring to quickly find leaks, battery backup, WiFi/2G/4G/GSM/cellular connection, sprinkler override...

Rapid detection and quick isolation is essential to mitigate water damage.

Why choose Quensus?

We provide solutions, not products

Effective water management and leak detection is all about service, not a product. Without a good plan, installation, commissioning, programming, and training, the best product in the world will not help.

Using our proprietary online software as the backbone of our service allows us to provide all the necessary components of a complete system for you, including dedicated customer support, continuous CPD training, bespoke Standard Operating Procedures (SOP), configuration of alert settings, consultancy for consumption data and leakage reporting, dedicated technical support, diagnostics of wireless equipment and signal quality, and servicing requirements.

We provide value for money

Our systems are the most versatile on the market. Virtually any mechanical system can be installed or retrofitted, and we also supply contact based leak detection as well as flow based solutions.

When designing the best system for your site, you must remember the larger the pipe, the more difficult it is to analyse usage patterns and detect leaks. We will work with you to design the most effective system with the best value.

We work with a number of technologies and are always innovating such as our new wireless splash sensors with a 15 year battery life. We will always find a solution that is reliable and affordable.

We provide a great service

This is not just another Waterguard or Floodcheck or Aquaguard or Autostopcock or Leaksafe or Aquilar...

Our leak alerts are dynamic, meaning fewer false detections. Other leak detection systems work on the principle of time only. LeakNet works off time, volume, time of day, day of week, and more, using machine learning to automatically set parameters for maximum protection with minimum false alerts.

And because construction sites are often unpredictable, and you will probably have no time to deal with leaks, we offer a leasing option providing you with ongoing support for as long as is required. We call this "Water Management as a Service".

Water Management as a Service

Instead of simply providing hardware, we will work with the Responsible Person(s) and your insurance provider to ensure the appropriate system is specified, installed correctly, provide commissioning certificates, and give training to all nominated duty holders.

Installation CPD Training

On-site and/or remote training to contractors for the installation and operation.


Each multi residential/commercial project is managed by a dedicated engineer providing technical support and commissioning with commissioning certificates available at no extra cost.


Leak systems can be migrated between phases and to the final occupant/property manager/concierge for which we provide further CPD training and bespoke Standard Operating Procedures (SOP).

Proprietary Online Software

  • Easy to use dashboard to control multiple systems
  • Remote open/close valve
  • Automatic shutoff (even when offline)
  • Learning Functionality
  • Drip alarms
  • Leak Alerts (SMS and email)
  • Timed shut-off
  • Share access with unlimited users
  • Holiday Alarms
  • Full alert history and valve log
  • Grouping functionality
  • Real Time View

Typical Project

  • 2 x temporary supplies @ 1" pipe size
  • LeakNet smart shut-off valve installed on both pipes
  • Second phase introduces a 2" boosted permanent supply
  • LeakNet installed on permanent supply before and after boosted set, plus wireless splash sensors placed in plant room and risers
  • Commissioning, training, software, alerts, support and handover provided throughout project for only £450 per month
  • Leaks caught fast, damages mitigated, happy client

Frequently asked questions

Dive into our FAQ for more details

How does the system detect leaks?Machine learning is used by our software to profile the site using normal consumption patterns in a typical weekday or weekend. The learning algorithm recognises events using time and volume of water within certain time periods in a day. This apparent simplicity brings the optimum balance of sophistication and ease of use.
The user can run the learning algorithm whenever they feel it is required - after installation, when a new phase is due on site, or after a fault is fixed. The ability to view and manually override these thresholds within the software means that users stay in control and can easily understand why any alerts have occurred. The user can always override alarms on-the-fly so the water does not shut off during critical works.

What is required for installation?There are 3 stages: plumbing, electrics, and internet connection.
1. Plumbing: if you want to shut the water off automatically, a motorised valve and flow meter will be installed inline with the mains stopcock.
2. Electrics: the system runs off 12v DC, so an existing 240v mains socket or 110v site supply may be used. Supply can be located up to 10m away.
3. Internet: normally via WiFi, but to create a self-contained network, cellular GSM/3G/4G can also be used with a cellular gateway. Quensus will provide any network equipment and commission all units.

Is there a maximum size valve/meter?We can go to sizes up to 5" (flanged) systems.

The smaller flow sensors we use have much higher resolution and are much better for leak detecting applications. The main reason is that a low pulse frequency output (10 litres per pulse) will decrease the leak detection speed significantly because you have to wait for that amount of liquid to pass before it gives any pulse. A string of several pulses are needed to correctly identify a leak. Our ¾” and 1” flow sensors give a pulse every 2ml and 8ml which allows real-time visualisation and massively enhances the speed to spot anomalies.

The second reason is that your 2”-5” pipe will likely supply a large area, where users might be consuming water constantly, with less predictable patterns. This makes projecting the water usage difficult, and therefore the ability to spot leaks. If a leak is spotted, it may also be more difficult to track, HOWEVER at least you will know how much wasted water is leaking and its profile so finding it will be easier than traditional methods.

The optimum solution is to submeter. We would always recommend submetering as much as possible to isolate all areas at risk. A combination of both mains metering and submetering is particularly powerful in detecting leaks, as the sum of all the submeters should equal the mains meter. FlowReporter has functionality for entering and comparing billing meter information so even without automatic readings, you can get an overview of your site’s overall performance.

How many users can be alerted?An unlimited number of contacts can be alerted by email and/or SMS text message.

Where does your information come from?This guidance is relevant to buildings undergoing construction and refurbishment during pre-construction and construction phases, most importantly commercial and multi-tenure residential developments.

The information is based on Best Practice Guidance: Managing Escape of Water Risk on Construction Sites, published by the Construction Insurance Risk Engineers Group 5th Edition November 2019. It is endorsed by all CIREG and UK CAR Underwriter member companies and represents industry best practice in the avoidance of escape of water losses.

Statistics have come from the Association of British Insurers and an empirical analysis on "smart shut-off valves as an effective water loss prevention tool for construction sites" provided by Munich RE.

To get your own CIREG compliant system please contact us today.

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