Bleeding your radiators is one of the simplest and most effective ways to improve your home’s heating efficiency — and save money.
Here’s a step-by-step UK guide.
🔧 Tools You’ll Need:
- Radiator bleed key Buy on Amazon UK
- An old towel or rag
- Small container to catch drips
- Optional: gloves
🪜 Step-by-Step Guide:
1. Turn off your heating
Let the radiators cool down before you start — this avoids scalding and gives air bubbles time to settle.
2. Find the bleed valve
Usually at the top side of your radiator. It looks like a small square hole inside a round nut.
3. Insert the radiator key
Place the key into the valve and turn anti-clockwise slowly. You’ll hear a hissing sound — that’s the trapped air escaping.
4. Wait for water
As soon as water starts to come out (a steady stream), tighten the valve by turning clockwise.
5. Check boiler pressure
Releasing air can lower your boiler pressure. If needed, repressurise your system using the filling loop.
📌 Safety Tip:
Always use the correct key and protect floors from water.
🛠️ Recommended Tools:
✅ Done!
You’ve now bled your radiator and improved your heating efficiency.
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