RADIATOR LEAKS – HOW TO FIND
& FIX RADIATOR LEAKS FAST!

How To Check If A Radiator Is Leaking

Check if a radiator is leaking by visually inspecting the area around the radiator for any signs of corrosion, water puddles, damp patches, or staining on adjacent walls or floors.

Listen for any hissing or dripping sounds, which are signs of a leak from the radiator.

Feel the radiator's surface for any unusual wet spots or temperature inconsistencies, particularly focusing on areas around valves and pipework connections.

3 Primary Causes of Radiator Leaks

1. Damaged or loose valves

Radiator valves can become loose or suffer wear and tear becoming loose or damaged, leading to leaks.

Regularly inspect PRV and standard valves for any signs of water seepage, corrosion, or damage.

It's important to ensure that they are tightly secured and functioning properly.

If you notice any corrosion or damage, it may be time to consider replacing the valve to prevent further leakage.

2. Radiator rust

Rust is a common issue, especially in older radiators.

Radiator rust results from prolonged exposure to moisture or a corrosive environment, which can weaken the metal of the radiator and lead to leaks.

If you find that rust has penetrated deeply into the metal, causing significant weakening, it may be time to replace the radiator.

3. Loose or damaged spindle

The spindle, a component of the radiator valve, can become loose or damaged over time. The spindle is integral in maintaining a tight seal within the valve.

Check the spindle for any signs of wear or damage.

If the spindle is not functioning correctly or is damaged, replacing the spindle is the solution to stop the leak and ensure the valve operates efficiently.

How to Fix a Leaking Radiator

1. Locate the source

The first step in fixing a leaking radiator is to accurately locate the source of the leak. A radiator can leak from the valve, pipework or the body of the radiator.

2. Drain the radiator

Before attempting any repairs, it's important to safely drain the radiator.

1. Turn off the heating system
2. Allow the radiator to cool down.
3. Release the water from the radiator, ensuring you have a container or towels ready to catch the water. This step is essential to prevent water spillage.

3. Fix Radiator leaks

For minor leaks in the radiator body, applying a suitable sealant can provide a temporary fix. However, this is often a short-term solution and is not recommended.

For larger leaks or if the radiator is extensively damaged, replacing the entire radiator might be the most effective course of action.

4. Repair radiator valve leaks

Leaks originating from a valve can often be resolved by tightening the valve or replacing worn-out components such as washers or nuts. The entire radiator valve may need to be replaced. It's crucial to ensure that any new parts are installed correctly to prevent future leaks.

5. Turn the radiator on and check the repair

After completing the repairs, turn the heating system back on and closely monitor the repaired area for any signs of leakage. This step is essential to confirm the effectiveness of the repair and to ensure that there are no further issues.