Control Flow visited our property after we received a letter, and they were very helpful and let us know what was happening during every step of the way. They were extremely friendly and made us feel... See more
Company replied
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Control Flow visited our property after we received a letter, and they were very helpful and let us know what was happening during every step of the way. They were extremely friendly and made us feel... See more
Company replied
We did not receive prior notification from United Utilities when an employee from ControlFlow turned saying we were using more water than we should be - we are fairly typical - and hustled their way o... See more
Company replied
Great experience. The team were friendly and professional and explained everything that was happening and why. It was completely free, so I’m looking forward to seeing results!
Company replied
I did receive an email regarding having a water test on my property. I assumed this would be optional ? I do appreciate you are trying to help. But I was disappointed when one of your employees ca... See more
Company replied
At Control Flow Technologies Group, we help customers and organisations save water, energy, and money with our patented HL2024® technology. With our Control Flow HL2024® devices, we deliver a fully tailored, turnkey service that tackles some of the UK’s most pressing challenges: water scarcity, rising utility costs, and nutrient neutrality. We work with the UK's major water companies to deliver free Water Audits to customers, helping them save water and money on their utility bills.
Unit 1C Hylton Park, SR5 3HD, Sunderland, United Kingdom
Replied to 60% of negative reviews
Typically replies within 1 month
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United Utilities contacted me several times encouraging me to book a free water-saving visit with Control Flow. After being contacted in person and multiple times by email, I eventually went ahead and booked an appointment online. I received a confirmation and arranged my day around it.
On the day of the visit, nobody turned up. There was no cancellation, no email, no phone call and no apology, nothing at all. I was left waiting in for an appointment that simply never happened, which was a complete waste of my time.
If appointments can’t be honoured, the least customers should expect is basic communication. Very disappointing experience.

Reply from Control Flow Technologies Group Ltd
Company made appointment, but never turned up

Reply from Control Flow Technologies Group Ltd
Very disappointing customer service. I was pressured into installing a control valve in just one day, with the promise that they would respond immediately if any issues arose. From an hour after installation, I began contacting their customer service team — they took down the details but never followed up or resolved the problem. It’s clear they are focused solely on pushing more installations to generate revenue from the water company, with little to no concern for the customer issues.
A Cenergist operative came to my home following referral from United Utilities.
Complete waste of time.
Was here for about 15 minutes.
All he did was alter the flow to my taps which I altered back again after he left because there was so much noise due to the restriction of the flow coming through.
Think I had more knowledge of how a house water system works than he did
The engineer (Cole) who contacted us was a consummate professional, courteous and respectful of the property, who explained the product and its benefits clearly and well. His review was detailed, after which he proceeded with the installations as appropriate without any oversight from me. The time for installation was less than an hour, very impressive, and he also was mindful of any water spillages, which showed enormous consideration, again a sign of his professionalism.
I am eagerly looking forward to my reduced water and gas bills!
Very professional service from start to finish. The engineer was very polite and explained the products and benefits very well. The install was quick and easy -no mess. Looking forward to my reduced water and gas bills.
I was contacted by an engineer who explained we could have a device fitted to our water meter to reduce the flow, and save us money. A date was arranged, and the device fitted. The flow has been reduced, but not so it impacts general use. If it helps to save the amount of water used, and cuts my water bill, then it's a win win.
The engineer was professional, friendly and I'm pleased to have had the device fitted.
Its imporant to me to reduce impact and conserving water is one of my aims. Control Flow came to my house on time as booked, did a survey and took some measurements, and ran me through some options to save water. They showed me what the likely savings would be (around 60L per day). Then they quickly and neatly made the changes. They were tidy, considerate and friendly. I'm delighted with the results.
Given the cost of living crisis, I’ve been looking for ways to reduce our household bills and be as efficient as I can be. We’ve also recently brought a lovely baby girl home so we are conscious that we will be using more energy and water than we are used to. I contacted Control Flow earlier this year to arrange for an engineer to visit to give us some advice on what products may be suitable for our property. An engineer named Kristian attended. It was so straight forward. As I’m on a water meter he advised that he could install a product in the meter chamber outside so we wouldn’t have anything visible in our property and he wouldn’t need to cut into any pipework. The installation took about 25 minutes and he gave us some advice on how to maximise our savings. I’ve been monitoring our usage through meter readings and we are seeing some great savings. Can’t wait to see how much we save financially. Highly recommend!
Great service from start to finish, everything was explained in great detail. the plumber who attended was pleasantly polite and professional! A fantastic little device which has already shown to do exactly what it is said to!
Great little device that is already saving me money! Installation was done quickly and efficiently with no mess!
Fantastic service and great products! The online booking service was straight forward and easy to follow. The installer on the day was very polite and knowledgeable about the products he was installing in my property.
Great service! Professional from start to finish and explained everything.
My bills have also noticeably reduced!
Great service from start to finish. We had Cole come and install the device to save water from our shower and taps!
He thoroughly explained what he was going to be doing, which products he was going to use and how they reduce water consumption.
The install was quick and efficient and only involved a short duration with no water.
Overall there doesn’t seem to seem be a difference in water service, so all there is now is to save water and money!
Effortless install, minimal/no disruption to water service. Professional customer service, very clear explanations of what was being done and why. No discernible difference in water service since install. Looking forward to the cost savings!
A smooth and easy process.
Cole was very helpful and explained what he was doing at every step.
Great service, Cole explained exactly what he was going to do, explained which products he was going to install and why and once installed, advised how much water it would save me. Very efficient.
Quick install, explained everything and we are now using less water without any negative impact. Even took all his rubbish away when I offered to dispose for him.
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