An Alternative to ADI Leak Detection in London

ADI are a capable national leak detection specialist with a fixed day-rate price, but they publish that drying and reinstatement are separate work they refer elsewhere, that they do not repair roof or structural leaks, and that their no-find-no-fee applies only to mains and mains-fed plumbing losing at least half a litre a minute on a run up to 30 metres; we work by the hour at £150, and we repair and make good ourselves.

Side by side

Dimension	ADI Leak Detection	Leak Fix London
Detection price	Fixed, published: £495 + VAT half day for roof or structural, £595 + VAT full day for plumbing, heating, mains, underfloor, bathroom, drainage, ceiling or irrigation, £1,190 + VAT for a pool. Read 19 Sep 2026.	£150 per hour, agreed before we attend. The rate cannot rise; the total depends on the hours.
Charging model	Fixed day rate. "We allocate a full day to every pipework leak detection investigation."	By the hour, so a leak found in ninety minutes is billed as ninety minutes.
No find, no fee	Offered, but only on water mains and internal mains-fed supply pipes, for a single leak at one property, where the loss measures at least 0.5 litres per minute, on mains up to 30m, and not for central heating, structural or swimming pool leaks.	No find, no fee. If we do not find the leak, you do not pay for the time we spent looking.
Repairs	Plumbing, central heating, water mains and swimming pools, guaranteed. They state they do not repair roof or structural leaks and do not do general plumbing or heating installation.	Full pipework repair and replacement in copper, MDPE, push-fit and lead.
Drying and reinstatement	Not offered: "Drying and reinstatement are separate work, and we can recommend a national company for it."	In house. Our own handymen and builders do flooring, screed, plaster, ceilings, tiling, decoration and structural making good.
Insurance report	A written report by the attending engineer with photographs and video, formatted for trace and access and escape of water claims.	A full leak detection report written to be accepted by insurers for a trace and access claim.
Coverage	England, Scotland and Wales, with around 5,000 jobs a year stated.	London.
Independent rating	Trustpilot 4.7 from 1,617 reviews, read 19 Sep 2026.	None. The site is new and we do not publish ratings we have not earned.

Where these figures come from

ADI Leak Detection is a trading name of ADI Leak Solutions Ltd, registered in England and Wales, company number 15870765.
ADI Leak Detection — About Us
Companies House records ADI Leak Solutions Ltd, company number 15870765, as an active private limited company incorporated on 1 August 2024, with a registered office at Unit L BPI House, Cores End Road, Bourne End, SL8 5AS.
Companies House — ADI Leak Solutions Ltd
Their About Us page states that ADI Leak Detection was founded in High Wycombe in 2011 by Adrian Morgan.
ADI Leak Detection — About Us (history)
They state they have 25 leak investigation engineers, that every engineer joins from a plumbing or heating background with a minimum of three years on the tools and then completes in-house training, and that around 5,000 jobs a year are completed across England, Scotland and Wales.
ADI Leak Detection — About Us (team and scale)
Published fixed prices, all plus VAT, as read on 19 September 2026: £495 for a half-day roof or structural investigation, £595 for a full day on plumbing, central heating, water mains, underfloor heating, bathroom, drainage, ceiling or irrigation, and £1,190 for a swimming pool.
ADI Leak Detection — Leak Detection FAQs
Their pricing page states that water leak detection "starts from £595 plus vat for a leak investigation" and that costs for leak detection services in the UK "will range from £595 – £1500+".
ADI Leak Detection — The True Cost of Water Leak Detection
Their London page states that "cost effective solutions for detecting a leak in London start from £495 plus VAT".
ADI Leak Detection — London
The charging model is a fixed day rate rather than hourly: "We allocate a full day to every pipework leak detection investigation."
ADI Leak Detection — FAQs (day rate)
Their no-find-no-fee is offered "on water mains and internal mains-fed water supply pipes" and the published conditions are that it applies to investigations for a single leak at an individual property, that the leak must be losing at least half a litre of water per minute, that it applies to hot and cold feed plumbing leaks, that it applies to water mains up to 30m long, and that it is "not applicable to central heating, structural or swimming pool leaks".
ADI Leak Detection — FAQs (no find no fee conditions)
They state they repair leaks on plumbing, central heating, water mains and swimming pools with all repair work guaranteed, and that they do not repair roof or structural leaks, which they locate and report on, and do not provide general plumbing or heating installation work.
ADI Leak Detection — About Us (repair scope)
Asked whether they dry out and reinstate, their FAQ answers: "No. Drying and reinstatement are separate work, and we can recommend a national company for it."
ADI Leak Detection — FAQs (reinstatement)
Their London page states: "We repair water leaks on plumbing, heating, water mains and swimming pools. We do not repair structural or roof leaks."
ADI Leak Detection — London (repair scope)
Every investigation ends with a written report by the attending engineer, supported by photographs and video, formatted for trace and access and escape of water insurance claims.
ADI Leak Detection — About Us (reporting)
Detection methods listed are tracer gas, acoustic listening, leak correlation, thermal imaging, borescope cameras, moisture meters, CCTV drain survey and drone inspection.
ADI Leak Detection — About Us (methods)
Their pricing page states: "The costs of trace and access leak detection are fully reimbursable if you have trace and access cover on your home or building insurance policy."
ADI Leak Detection — pricing page (insurance)
Accreditations and memberships published are CIPHE, WIAPS, WaterSafe approved contractor and SPATA, with some engineers holding CSCS cards; no membership numbers are published, and ISO 9001, ISO 14001 and Safecontractor are listed as in development with a 2026 target.
ADI Leak Detection — Our Accreditations
On Trustpilot, ADI held a TrustScore of 4.7 out of 5 from 1,617 reviews on 19 September 2026, with 89% at five stars and 7% at one star.
Trustpilot — adileakdetection.co.uk
Trustpilot summarises the recurring positive themes as professional and knowledgeable engineers, fast response, clear explanation of findings and locating leaks other contractors had missed, and the recurring critical themes as cost and unexpected additional charges, investigations that did not locate the leak, and occasional damage during access work.
Trustpilot — ADI review themes

ADI Leak Detection is an independent company and is not affiliated with Leak Fix London. Figures above are quoted from the public sources linked and were correct on 2026-09-19. Ratings and prices change; check the source before relying on one.

Leak Fix LondonLast updated 19 September 2026

Flooring and plaster being made good after a leak repair

The honest summary

ADI are the most direct specialist competitor we have, and on detection they are good at it. Their own site describes 25 leak investigation engineers, each recruited from a plumbing or heating background with at least three years on the tools before in-house training, and around 5,000 jobs a year across England, Scotland and Wales. Their equipment list is the full set: tracer gas, acoustic listening, leak correlation, thermal imaging, borescope, moisture meters, CCTV drain survey and drone inspection. Their Trustpilot profile stood at 4.7 from 1,617 reviews when we read it on 19 September 2026.

The difference between them and us is not who can find the leak. It is what happens in the hour after it is found, and how the bill is built.

What they publish about scope, in their own words

Two lines from ADI's own pages matter more than anything we could say about them.

"No. Drying and reinstatement are separate work, and we can recommend a national company for it."

"We repair water leaks on plumbing, heating, water mains and swimming pools. We do not repair structural or roof leaks."

That is a clear, well-disclosed scope, and there is nothing wrong with it. A leak detection company that repairs pipework and refers the drying and the making good is a legitimate business model, and most of this market works that way. But it tells you what the job looks like from your side of it. On a leak under a screed floor, someone has to lift the floor to reach the pipe, and then someone has to lay screed and re-lay the floor covering. If your detection firm does not reinstate, that is a second contractor to find, a second quote to get, a second visit to schedule, and a seam in the work where responsibility can fall between two companies.

We are the other model. We find it, repair it, and our own handymen and builders put the floor, wall or ceiling back. That is the whole reason this company exists, and it is why the comparison below is not really about price.

The price comparison, and what a day rate does

All figures read from ADI's own pages on 19 September 2026. Their published prices are fixed and stated plus VAT: £495 for a half-day roof or structural investigation, £595 for a full day on plumbing, central heating, water mains, underfloor heating, bathroom, drainage, ceiling or irrigation, and £1,190 for a swimming pool with two divers. Their pricing page frames the wider UK market as ranging from £595 to £1,500 and above, and their London page states that detection in London starts from £495 plus VAT.

Their FAQ explains the model: "We allocate a full day to every pipework leak detection investigation." Their own comparison table sets that against a general plumber charged "Hourly, open-ended".

That framing is fair as far as it goes. An open-ended hourly search with no cap and no outcome guarantee is a genuinely bad deal, and a fixed day rate protects you from it. But a day rate cuts the other way as well. A dropped pressure gauge traced to a weeping manifold joint in ninety minutes costs the same as a day-long search of a four-storey house. We charge £150 per hour and bill the hours we use, which is better value on the straightforward jobs and worse on the ones that take two full days. If you want certainty of total cost above all else, ADI's model gives you that and ours does not. What ours gives you is that you are not paying for a full day you did not need. Our pricing page sets out how the rate works, including the part that matters most: the rate is fixed before we attend, the total is not, and nobody honest can tell you the total before they have seen the job.

The no-find-no-fee comparison, in full

This is the one that gets misrepresented most often, so here it is complete. ADI's published answer to whether they offer no find no fee is "Yes, on water mains and internal mains-fed water supply pipes", and the conditions they publish are:

It applies to investigations for a single leak at an individual property.
The leak must be losing at least half a litre of water per minute.
It applies to hot and cold feed plumbing leaks.
It applies to water mains up to 30 metres long.
It is "not applicable to central heating, structural or swimming pool leaks".

Read what that excludes. Central heating is the single most common hidden leak in a London flat, and it is outside the guarantee. A loss below half a litre a minute is outside it too, and a pinhole weeping into a screed floor is very often well below that threshold. Structural leaks are outside it. A mains run longer than 30 metres is outside it.

Ours has none of those carve-outs. If we do not find the leak, you do not pay for the time we spent looking, and that applies to the heating circuit that will not hold pressure as much as to the mains. That is a real difference, and it is the reason to read the conditions of any no-find-no-fee offer rather than the headline.

What the reviews say, in aggregate

Trustpilot's summary of ADI's profile on 19 September 2026 showed 4.7 from 1,617 reviews, with 89% five-star and 7% one-star. The platform's recurring positive themes were professional and knowledgeable engineers, fast response, clear explanation of findings, and locating leaks other contractors had missed. The recurring critical themes were cost and unexpected additional charges, investigations that did not locate the leak, and occasional damage during access work.

Take that as it reads. A 4.7 from that many reviews is a strong record, and "found the leak others missed" recurring as a theme is exactly what you want from a detection firm. The critical themes are the ordinary risks of this trade, and they are the same risks you should ask us about before you book.

When ADI are the better call

You are outside London. They cover England, Scotland and Wales; we cover London only.
You have a swimming pool leak. They publish a specific product for it with divers; we do not do pool work.
You need a fixed total agreed before anyone attends, and you are willing to pay a full day's rate for that certainty even on a short job.
Your leak is a straightforward mains supply pipe loss over half a litre a minute on a short run, which is squarely inside their guarantee.
You want a detection-only survey and already have a builder lined up for everything after it.

When to call us instead

The leak is under a floor, behind a wall or above a ceiling, and something will have to be opened to reach it. We open it, repair it and close it back up. See leak damage repair and reinstatement.
It is a heating leak. It sits outside ADI's no-find-no-fee conditions and inside ours.
You want one company answerable for the whole job rather than a detection report and a recommendation.
The job is likely short, and a full day's fixed fee is more than the work warrants.
You are making a trace and access claim and want the detection, the access, the repair and the making good all documented by the firm that did them.

When you do not need either of us

If you can see where the water is coming from, you do not need leak detection at all. A weeping compression joint under a basin, a failed flexible tap connector, a radiator valve gland that drips when the heating is on: those are plumbing jobs, priced by the hour, and paying a detection fee to confirm what you can already see is money wasted. The same is true of a stain that only appears after a shower and dries out between uses, which is usually sealant or grout. Detection earns its fee when the water is real, the damage is real, and nobody can say where it starts. If that is you, book an engineer.

Frequently asked

How much does ADI Leak Detection charge?

Their published fixed prices, read on 19 September 2026, were £495 plus VAT for a half-day roof or structural investigation, £595 plus VAT for a full day on plumbing, central heating, water mains, underfloor heating, bathroom, drainage, ceiling or irrigation, and £1,190 plus VAT for a swimming pool. Their London page states that detection in London starts from £495 plus VAT.

Does ADI offer no find no fee?

Yes, but narrowly. Their published answer is "Yes, on water mains and internal mains-fed water supply pipes", subject to four conditions: a single leak at one property, a loss of at least half a litre per minute, mains up to 30 metres, and no application to central heating, structural or swimming pool leaks. Our no find, no fee carries none of those exclusions.

Does ADI Leak Detection repair the leak and make good the damage?

They state they repair leaks on plumbing, central heating, water mains and swimming pools, and that they do not repair roof or structural leaks. On drying and reinstatement their FAQ says: "No. Drying and reinstatement are separate work, and we can recommend a national company for it." We do the repair and the making good ourselves.

Is a fixed day rate better than an hourly rate for leak detection?

It depends on the job. A day rate caps your exposure on a difficult search, which is worth real money on a large property with several candidate leaks. An hourly rate is better value when the leak is found quickly, because you pay for the time used rather than a day allocated. The risk an hourly rate creates is an open-ended search, which is what no find, no fee exists to remove.

Who writes the insurance report, and will an insurer accept it?

ADI state that every investigation ends with a written report by the attending engineer, with photographs and video, formatted for trace and access and escape of water claims. Ours is a full leak detection report written to be accepted by insurers for a trace and access claim. Either way, check your own policy for trace and access cover before you book, because that is what decides whether the cost comes back to you.

Is ADI Leak Detection a franchise?

Their own About Us page describes engineers recruited from plumbing and heating backgrounds and trained in house, with new engineers shadowing an experienced engineer until sign-off by their technical manager. We have not seen anything published either way beyond that, so we are not going to characterise their employment model further.