Real Engineers. Real Skills. Real Accreditation. Based just minutes from Cockfosters.
Cockfosters sits well within our coverage area, around 20 minutes from our Borehamwood base, and we visit regularly. Our engineers bring thermal imaging, acoustic survey tools, and tracer gas to every job, confirming exactly where a leak is before any floor or wall is touched.
A leak doesn’t always announce itself straight away. It might be a water bill that’s climbed for no clear reason, a damp patch on a wall that never quite dries, or a boiler that keeps losing pressure. All of these point to the same thing: water escaping somewhere it shouldn’t be.
We don’t start with assumptions. Thermal imaging, acoustic listening equipment, and tracer gas let our engineers confirm exactly where a leak is before any repair is even discussed. Once we’ve found the source, we’ll explain what it means, recommend the right fix, and put together insurance documentation if it’s needed.
EXCELLENT Based on 67 reviews Posted on Google Mohammad Fazal (John)Trustindex verifies that the original source of the review is Google. Professional A Team These guys are brilliant, honest and do what they say. Not Just that, they also go extra mile. I highly recommend these guys
Owner's reply
Hi Mohammad , We really appreciate your feedback. And we’re delighted you’re happy with the service provided.Posted on Google M NTrustindex verifies that the original source of the review is Google. Never in my life have I come across a company this professional 👌🏻They explained everything clearly from the start and found and fixed the leak under my shower tray without breaking a single tile. They even put the shower tray and screen back perfectly like nothing had ever happened. Another company quoted me more than double the price, but these guys charged £727 and did an amazing job. Both engineers were amazing.Definitely the best around. Highly recommend.
Owner's reply
Hi Mr Maxwell, Thank you so much for your kind review. We really appreciate you taking the time to leave us your feedback. Our clients always come first,and we’re glad to hear you were happy with the service.Posted on Google A PTrustindex verifies that the original source of the review is Google. James arrived promptly on time. Extremely professional, quick and efficient. I have no hesitation in highly recommending Geldon and James. I will definitely contact them when I update my radiators later in the year. Thank you for an excellent service from start to finish.
Owner's reply
Hi Alison, Thank you so much for taking time to leave such wonderful feedback. We’re delighted to hear that James & Geldon provided a prompt, professional and efficient service and we will make sure your review its forwarded to our engineers 🙏🏻Posted on Google Angie GTrustindex verifies that the original source of the review is Google. Chris V was very helpful, and polite, turned up on time, did a thorough investigation to find out a damp patch on the carpet wasn't a pipe leak which was reassuring.
Owner's reply
Thank you so much for your kind review, We’re delighted to hear Chriss provided a thorough and reassuring service. We really appreciate your feedback and are always here if you need us again.Posted on Google Charlie YTrustindex verifies that the original source of the review is Google. Jim, spent a lot of time finding the issue and double checking no other sources, doing numerous tests I have seen no other plumber do. Giving advice with a friendly smile, leaving with a happy customer. Thanks again
Owner's reply
Thank you for the wonderful review,Charlie! We’ll be sure to pass your kind words on to Jim. We really appreciate we could provide through the service you deserved.Posted on Google Andreea IonelaTrustindex verifies that the original source of the review is Google. Great work, highly recommended! 💯 Thank you so much!
Owner's reply
Hi Andreea, Thank you for your kind words! We’re delighted you had a great experience.Posted on Google Betty CawelyTrustindex verifies that the original source of the review is Google. Aleks from PrimeFix found my leak in an area I would never have expected. It took some time and wasn’t a cheap job, but it was a very difficult leak to find. He worked carefully and managed to locate it with minimal damage. Big thanks to Aleks and the PrimeFix team for their hard work and professionalism. Highly recommended.
Owner's reply
Hi Betty , Thank you for your kind words and recommendation. We’re glad Aleks was able to find the leak and keep the exposure damaged to minimum. We really appreciate your supportPosted on Google ray fahtiTrustindex verifies that the original source of the review is Google.
Owner's reply
Hi Ray , Thank you for the feedbackPosted on Google Matt ConroyTrustindex verifies that the original source of the review is Google. Excellent work with promised support if needed after plumbing in our wunder underfloor heating. Would reccomend 👍🏼
Owner's reply
Hi Matt , Thank you and we really appreciate the feedback. Gland we would help and of course we’re always here if you need any further support in the future 🙏🏻Posted on Google Kirsty BrownTrustindex verifies that the original source of the review is Google. ⭐️⭐️⭐️⭐️⭐️ We had an underground leak at my 88-year-old mother’s property and contacted Prime Fix Group Ltd. The engineer arrived promptly and, after carrying out an assessment, called me directly to explain the issue, the required work, and all costs involved, as he did not want to stress my mother with the situation. Very professional service from start to finish with no hidden fees at all. Everything was explained clearly before any work was carried out. We submitted the report to our insurance company, who recognised Prime Fix as highly qualified engineers. Highly recommended.
Owner's reply
Hi Mr Brown, Thank you for your kind words and recommendation. We’re glad we could help and make the process as stress-free as possible for your mother






Your quote is confirmed in writing before any work starts, no call-out fee, no parking costs, nothing added on afterwards.
Every job comes with our 18-month workmanship guarantee.
We work through a fixed process on every job: rule out the obvious first, then confirm the exact source.
Nothing is opened up until we’re certain. Here’s the equipment that makes that possible.

A boiler or heating system that loses pressure with no clear cause is often the first sign of a leak. We isolate the circuit, build it back up to a controlled test pressure, and narrow the fault down, usually within an hour.

Water travelling behind a wall or under a floor creates a small temperature difference that an infrared camera can detect straight away. Nothing gets opened until the camera has pointed us in the right direction.

A floor that's gone soft, damp reappearing in the same place, a ceiling stain with no roof fault to explain it: moisture readings show how far the water's spread and which way it's travelling.

Pressurised water escaping through a pipe makes a sound of its own. Ground microphones and pipe-correlation equipment let us detect it even beneath concrete or hidden behind finished walls.

For leaks other methods can't find, we introduce a safe hydrogen-nitrogen mix into the system and track it with sensitive detectors until we locate the exact point of escape. It's the most precise method we use, reserved for the hardest cases.
Every quote is confirmed in writing before work starts. No call-out fee. No hidden charges.
Discounted rates for landlords, HMOs, and managing agents with multiple properties. Dedicated account manager included.
No hidden extras: no parking, fuel, ULEZ, or Congestion Charge surcharges. Materials at trade cost plus 30% markup, fully itemised on the invoice.
Account-client portfolios receive discounted rates from the published prices.
Real Engineers. Real Skills. Real Accreditation. Based just minutes from Cockfosters.
PrimeFix is based on Thirsk Road, Borehamwood, WD6, around 20 minutes from Cockfosters. It’s on the edge of our coverage area, but it’s a journey our engineers make regularly.
Whether you’re near the tube station, close to Trent Country Park, or over towards Hadley Wood, you’ll get the same reliable response, the same accredited, non-invasive detection methods (acoustic, thermal, tracer gas) we use everywhere, and the same 18-month workmanship guarantee.
On call around the clock in Borehamwood for leak detection, plumbing, heating, electrical, and drainage emergencies.
On call around the clock for emergencies. For planned work and quotes, we typically respond within the hour during business hours.
0208 108 0400
0757 700 2864
info@primefixgroup.uk
Monday to Friday 8am to 6pm | Emergency Line 24/7
Leave your details and a PrimeFix engineer will be in touch within 60 minutes.
Answers to what Cockfosters customers ask us most. If yours isn’t here, call 020 8108 0400 and we’ll go through it.
It’s an hourly rate: £85 +VAT for the first hour, then £42.50 +VAT per half hour after. You’ll have a confirmed price before we begin, with no call-out fee and no extra charges for parking, ULEZ, or congestion.
Most surveys are complete within one to two hours, depending on the property’s size and pipework. We’ll give you a realistic estimate at the point of booking, not after arrival.
Rarely. Thermal imaging, acoustic tracing, moisture mapping, and tracer gas usually pinpoint the source without any need to open anything up.
Yes, every time. A full digital report is produced for each job, covering the leak’s location, the methods used to confirm it, and our findings, in a format major UK insurers accept for trace and access claims.
Both are possible. Our emergency line runs 24/7, 365 days a year, with no out-of-hours surcharge. For anything non-urgent, we’ll simply find a time that works for you.
Yes. Every engineer holds NVQ Level 2/3 qualifications, Gas Safe registration, and NICEIC approval where relevant, and PrimeFix is CHAS accredited and SafeContractor approved.




















From emergency leak detection to full plumbing rebuilds: one trusted team, covering Greater London and the Home Counties.


Non-destructive water and gas leak detection using thermal imaging, acoustic equipment and tracer gas — with insurer-accepted reports.
Emergency and planned plumbing for homes and commercial properties/ From burst pipes and leaking fixtures to full system upgrades, 24/7.
Emergency and planned plumbing for residential & commercial properties. CCTV surveys, jetting, and emergency drain unblocking
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