Heating circuit leaks
Heating leak repair in Belgium
Water beside a radiator, a leaking radiator valve, damp heating pipework or a boiler pressure gauge that keeps dropping can point to a leak on the central-heating circuit.
Send your city, clear photos and the pressure reading if visible. Advice and repair options depend on access, diagnosis, parts and availability.
Helpful details: close-up and wide photo, pressure reading, property type, whether heating is on and whether the leak is a drip or steady flow.
Request a callback
Describe the issue and leave your phone number. Clear details help prepare the response.
Heating leaks this page is for
Leaking radiator
Drips from the side, bottom, bleed point, valve or union, often with rust marks or damp flooring nearby.
Leaking radiator valve
A thermostatic valve or fitting may leak when adjusted, when the heating is hot, or after a period of pressure changes.
Heating pipe or manifold leak
Visible pipework, fittings, manifolds or boiler-adjacent heating connections can need inspection and suitable repair.
Boiler pressure loss
Repeated pressure drops after refilling may be linked to a heating-circuit leak, but boiler components or hidden leaks must be ruled out.
Safe checks before calling
- Keep water away from sockets, appliances and boiler electrics.
- Move belongings, protect the floor and take photos before cleaning everything.
- Close accessible radiator valves only if they move easily; do not force old fittings.
- If the leak is heavy, turn the heating or boiler off only if you know how to do it safely.
- Do not dismantle hot or pressurised heating parts.
- Avoid repeatedly topping up pressure without advice.
- In an apartment, notify the landlord, property manager or syndic if water may spread.
Heating leak, water leak or boiler fault?
A heating leak is linked to radiators, radiator valves, heating pipes, manifolds or a closed central-heating circuit losing pressure.
If the leak is from a tap, toilet, sink, shower or domestic water pipe, use water leak repair. If the source is not visible, start with leak detection. For boiler error codes or internal boiler faults, see boiler repair.
How a heating leak visit is assessed
1. Review symptoms
Photos, city, pressure reading, leak position and property access help decide the safest next step.
2. Reduce risk
The first goal is to limit water damage and avoid unsafe electrical or pressurised-part handling.
3. Diagnose the source
The radiator, valve, fitting, visible pipe or boiler-adjacent heating circuit is checked according to access.
4. Repair or route correctly
Accessible parts may be repaired or replaced where suitable; hidden leaks or boiler-specific faults are routed to the right service.
What affects the cost?
No reliable price should be confirmed before the situation is checked. The cost depends on diagnosis, access, parts and the state of the heating system.
- Visible leak versus hidden source.
- Radiator, valve, bleed point, pipe, manifold or boiler-adjacent part.
- Need to drain, refill, bleed and pressure-check the system.
- Age, corrosion and compatibility of fittings.
- Apartment access, landlord/syndic coordination and availability.
What to send before booking
- City/commune and property type.
- Close-up photo of the leak and a wider photo of the room or boiler area.
- Short video if the drip is active and safe to film.
- Pressure gauge photo or reading if visible.
- Whether the system is hot/cold, on/off and whether pressure was recently topped up.
Related heating and leak services
For heating not working, cold radiators or a broader breakdown, see heating breakdown help. For boiler faults, use boiler repair.
When repair is no longer sensible, related pages include boiler replacement and gas boiler installation. General water leaks should go to water leak repair.
FAQ: heating leak repair
What should I do if my radiator is leaking?
Protect the floor, take photos, avoid electrics and close an accessible radiator valve only if it moves easily.
Why does my boiler pressure keep dropping?
It may be a heating-circuit leak, a boiler pressure component issue or a hidden leak. Repeatedly topping up is not a long-term fix.
Is this a heating leak or a water leak?
Radiators and heating pipes usually point to the heating circuit. Taps, toilets, showers and domestic pipes are general plumbing leaks.
Can every heating leak be fixed in one visit?
Not always. It depends on access, parts, corrosion, pressure behaviour and whether the source is visible.
What affects the price?
Access, part type, draining/refilling, system age, apartment constraints and availability all matter.
Which photos help most?
A close-up, a wider room/boiler photo and the pressure gauge reading if visible.
Ask about a heating leak
Send photos and the pressure reading if possible. Clear details help separate radiator/pipe leaks from hidden leaks, boiler faults and general water leaks.
Request a callback
Describe the issue and leave your phone number. Clear details help prepare the response.