Central Heating Leak Detection

A falling boiler pressure gauge deserves investigation, not endless topping up. Pro Plumbers traces central heating water loss in Sevenoaks, distinguishing escaping water from faults that can produce similar symptoms.

ABOUT THIS SERVICE

Following the evidence behind falling pressure

Repeated use of the filling loop, damp ceilings, floors or walls, and stains beneath radiator valves can point towards a leak. Corrosion around pipe joints, hissing or a boiler locking out on low pressure also warrant attention, although none identifies the cause alone. A fresh water smell is not a reliable sign of a heating leak. Describe what you can see and when pressure changes; this helps us choose an investigation rather than assume buried pipework needs exposing.

Minimum charge £90 + VAT, including the first hour on site. Larger jobs get a fixed, no-obligation price.

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Central Heating Leak Detection by Pro Plumbers in Sevenoaks

OUR PROCESS

How It Works

Record the pattern

Note pressure readings when the system is cool and after heating, alongside fault codes and how often you have refilled it.

Inspect accessible components

Look for moisture around visible pipes, radiator connections and valves. Check whether the pressure relief valve discharge pipe outside is dripping, without touching it.

Contain an active escape

Turn the heating off and isolate the water supply if safe and appropriate. Keep water away from electrics; do not touch wet switches or equipment.

BENEFITS

Investigation before opening the building

A measured starting point

Accessible checks and pressure testing guide the search before we discuss lifting flooring or opening a wall.

Appliance faults considered

Gas Safe registration supports appropriate boiler investigation, rather than treating every pressure problem as a hidden pipe leak.

An established contact

Pro Plumbers has traded for 15 years, with 169 Google reviews rated 4.9. We explain findings and proposed repairs.

Testing the circuit without unnecessary disruption

We begin with a non-invasive approach, using methods suited to the property. Checking exposed joints, valves and accessible boiler components can reveal losses that never reach a floor. Pressure-drop tests with sections isolated can narrow down the affected circuit. Boiler internals are for the appropriately qualified engineer to inspect, not a homeowner removing the casing.

When a pressure fault resembles a pipe leak

A failed or incorrectly charged expansion vessel can allow pressure to rise during heating, causing the pressure relief valve to discharge. The gauge may then fall as everything cools. Checking the vessel charge and relief valve helps separate this pattern from a leaking radiator or pipe. Avoid repeatedly topping up: fresh water can encourage corrosion and dilute inhibitor.

Different circuits need different checks

Sealed heating circuits have a pressure gauge and controlled filling arrangement. Open-vented systems usually receive water from a feed-and-expansion cistern, so losses may be replenished without a falling boiler gauge. Their feed, vent and overflow arrangements need consideration. Underfloor loops and buried pipes can be harder to locate or isolate; concealed leaks may require further investigation and agreed access. We explain those limits before disruptive work.

Deciding when to stop using the heating

Call promptly for recurring pressure loss, unexplained damp or visible discharge. If water is actively escaping, stop using the heating and seek advice; isolation arrangements vary. Protect electrics without entering a wet area or handling affected equipment. Contact 01732 444555 with your observations and details of any recent radiator or boiler work.

OUR ACCREDITATIONS