This page is here to help homeowners in Sussex who may be experiencing a central heating leak, including boiler pressure loss, leaking radiators, repeated system top-ups, and concealed heating pipework. The Leak Hunter specialises in locating and repairing central heating leaks, using non-invasive techniques to trace the source accurately before recommending the most appropriate solution.
The Leak Hunter is a specialist leak detection company, so if your symptoms relate to a different type of leak, we can still help. You can explore our other leak detection services using the menu above, or contact us and we’ll point you in the right direction.
Why Specialist Central Heating Leak Detection Is Different
When a heating system begins losing pressure, several causes are possible. In some cases it may relate to a gauge fault, an expansion vessel issue or a visible valve defect. In many instances, however, water is escaping somewhere within the heating circuit.
Repeated topping up may temporarily restore pressure, but it does not confirm the underlying cause. Replacing components without structured testing can sometimes resolve the issue, but more often it results in additional expense before the true source is identified — if it resolves it at all.
The most reliable way to resolve pressure loss is methodical diagnosis.
We determine the precise source before any access work begins. Access is controlled, repairs are targeted and unnecessary disruption is avoided.
This is specialist central heating leak detection focused on accurate diagnosis and controlled repair.
When Pressure Loss Means Action Is Needed
If you are topping up your boiler regularly, the system is not sealed.
You may need specialist detection if:
- Pressure drops every one to two days
- Radiators heat unevenly
- The boiler locks out
- Warm areas appear on solid floors
- Damp patches form near pipe routes
Leaving a heating leak unresolved increases the risk of timber damage, screed deterioration, internal corrosion and reduced system efficiency.
Early diagnosis protects both the property and the heating system itself.
Where Heating Leaks Typically Occur
In Sussex, heating systems vary across:
- Period properties with ageing copper pipework
- Post-war housing with concealed radiator circuits
- Modern developments with plastic barrier pipe systems
- Extensions built on screeded slabs
- Properties with wet underfloor heating
Leaks most commonly develop:
- Beneath screeded floors
- Within suspended timber floors
- Inside wall cavities
- Around concealed joints or radiator valves
- Within underfloor heating circuits
The visible symptom is rarely positioned directly above the leak itself.
Our testing narrows the affected area before access work begins, so only the required section is opened.
Why Choose The Leak Hunter for Heating Leaks in Sussex?
25+ Years’ Experience
With over 25 years’ hands-on experience, our team has located and repaired thousands of hidden leaks across domestic and commercial properties.
Specialist Leak Detection
We use professional non-invasive acoustic, tracer gas and thermal equipment to pinpoint leaks accurately before any access work begins.
Fixed Price Investigations
Our investigations are offered on a fixed price basis, so you know the cost upfront with no hidden extras.
Gas Safe & WaterSafe Approved
Our engineers are Gas Safe registered and we are a WaterSafe approved company, working to recognised national safety and installation standards.
Clear Diagnosis Before Repairs
Every investigation confirms the exact source of the leak first, ensuring the correct repair is carried out once identified.
12-Month Warranty
All completed work is backed by a 12-month warranty for added reassurance.
Fixed Price Leak Detection
£475 when the issue appears to be coming from a specific area (such as a bathroom, kitchen, or visible leak)
£795 for a full property investigation when the source isn’t clear or requires a more detailed assessment.
All pricing is agreed in advance, with no hidden costs.
Once located, we can also carry out the necessary repairs.
Price based on a standard domestic system. Larger or more complex systems will be discussed with you in advance.
How We Locate Your Heating Leak
We begin with a structured assessment of the heating system.
Visible components such as radiator valves, pressure relief valves and boiler connections are examined first. Where required, we confirm that the issue is not linked to boiler-related faults such as the expansion vessel, safety discharge or symptoms consistent with internal heat exchanger failure.
If a boiler-related fault is identified, it is evaluated carefully to confirm whether it fully accounts for the pressure loss. Even where a fault is found, the wider system is assessed to ensure there are no secondary or concealed leaks contributing to the issue.
Once obvious and boiler-related causes are considered, we proceed with specialist non-invasive detection where required.
Thermal imaging identifies abnormal heat distribution and concealed pipe routes.
Acoustic detection equipment isolates the sound frequency of escaping pressurised water.
Tracer gas testing confirms the precise escape point beneath screed or solid flooring.
Pressure and isolation testing determine which heating circuit is affected.
This structured process confirms the cause before any intrusive work is undertaken.
How Our Accurate Diagnosis Prevents Unnecessary Cost
Heating leaks are frequently misdiagnosed. Components may be replaced without resolving the pressure loss, or flooring may be lifted before the leak location is confirmed.
By identifying the precise source first, disruption is limited and repeat labour is avoided. This disciplined approach protects both the integrity of the property and the overall repair budget.
If investigation shows that the issue is not related to the heating circuit, we are able to extend testing to identify alternative sources such as mains water supply leaks or concealed internal plumbing faults. This ensures the underlying cause is identified rather than assumed.
Confirmed Leak Repair in Sussex
Once the source of pressure loss has been clearly established, we provide a fixed price for the agreed repair work.
Before any intrusive action is taken, you are given a full explanation of the findings and the proposed scope of work. This includes clarity around whether the issue relates to heating pipework, a boiler-related fault or another component within the system.
Where controlled floor access, screed opening, external excavation or component replacement is required, this is explained in advance. No lifting of flooring or opening of structures is carried out without prior agreement.
If the confirmed cause relates to a boiler component — such as the expansion vessel or another pressure-related fault — corrective work can be carried out safely and compliantly, as we are fully Gas Safe registered for domestic natural gas and LPG systems.
Following repair, the affected section is pressure tested, and the wider boiler and heating circuit are verified to confirm system integrity. Only once both the repair and the overall system are confirmed leak-free is the system refilled, re-pressurised and tested under operating conditions.
This controlled process ensures the fault is resolved properly and that pressure stability is confirmed before completion.
All completed repair work includes a 12-month warranty.
Not sure what’s causing the issue? Send us a photo on WhatsApp and we’ll take a look first.
Gas Safe Registered
Heating leak investigations require safe handling of boilers and pressurised systems.
We are fully Gas Safe registered and qualified to manage domestic natural gas and LPG heating systems safely during detection and repair.
Central Heating Leak Detection Sussex – FAQs
Why does my boiler keep losing pressure?
In many cases it is due to a concealed leak within the heating circuit, although visible components and boiler-related causes should always be assessed first.
Can leaks occur beneath concrete or screed floors?
Yes. Heating pipework frequently runs beneath solid floors and requires specialist detection methods.
Will large areas of flooring need to be lifted?
No. Access is limited to the confirmed leak location.
Do you repair the leak once found?
Yes. Repairs are carried out once the source has been identified.
Do you offer fixed price investigations?
Yes. Investigation costs are agreed before any repair work begins.
Insurance, Compliance & Professional Standards
All our work is carried out under comprehensive insurance cover and in accordance with recognised national safety and water system standards.
As Gas Safe registered engineers and a WaterSafe approved company, we are authorised to assess, isolate and repair domestic heating and water systems safely and compliantly.
Where required, structured trace and access documentation can be provided for insurers, clearly detailing the confirmed fault location, the diagnostic process undertaken and post-repair pressure verification.
Every investigation concludes with confirmed system integrity — not assumption.
Book Central Heating Leak Detection
If your heating system continues to lose pressure, a structured investigation confirms the true cause before any flooring is lifted or components replaced.
Arrange central heating leak detection and receive a defined repair plan with controlled access agreed in advance.
Fixed price agreed before attendance. Precise access. Warrantied repair.
Sussex forms part of The Leak Hunter’s established service area. Our applicable fixed-price leak detection services are available throughout our standard coverage area, with no additional mileage or travel supplements based on distance from our base.
