At My Home Services, based in Croydon, we know how important a warm, efficient home is, especially during the chilly months. One simple yet often overlooked task to keep your heating system running smoothly is bleeding your radiators. If your radiators are cold at the top, making gurgling noises, or not heating up properly, trapped air could be the culprit. Bleeding a radiator is an easy DIY job that can boost your home’s warmth and save on energy bills. Here’s our expert guide on how to bleed a radiator like a pro—and why it’s so important.
Why Bleeding a Radiator Matters
Radiators work by circulating hot water to release heat into your rooms. When air gets trapped inside, it creates pockets that prevent hot water from filling the radiator fully. This leads to cold spots, reduced efficiency, and a heating system that works harder than it needs to. By bleeding your radiators, you release this trapped air, allowing hot water to flow freely. The benefits are immediate: warmer rooms, lower energy bills, and a happier boiler. Regular maintenance like this also extends the lifespan of your heating system, saving you from costly repairs down the line. At My Home Services, we’ve seen countless Croydon homes transform their comfort with this simple fix.
What You’ll Need
Before you start, gather a few basic tools:
- A radiator bleed key (available at most hardware stores for a couple of pounds)
- A cloth or small container to catch drips
- A towel to protect your floor
- Optionally, a screwdriver if your radiator has a different valve type
Most radiators in UK homes have a square bleed valve at one end, typically at the top. If you’re unsure about your radiator type, My Home Services is just a call away to advise.
Step-by-Step Guide to Bleeding a Radiator
- Turn Off Your Heating: Safety first! Ensure your boiler is off and the radiators are cool to avoid scalding from hot water.
- Locate the Bleed Valve: Find the small valve at the top of the radiator. It’s usually a square peg inside a round fitting.
- Prepare the Area: Place a towel under the radiator and have your cloth or container ready to catch any water that escapes.
- Open the Valve: Insert the radiator key into the valve and turn it anti-clockwise about a quarter to half a turn. You’ll hear a hissing sound as air escapes. Don’t open it too far to avoid water gushing out.
- Listen for the Change: When the hissing stops and you see a steady trickle of water, the air is out. Quickly turn the key clockwise to close the valve tightly.
- Check All Radiators: Repeat the process for each radiator in your home, starting with the ones furthest from the boiler.
- Check Boiler Pressure: Bleeding radiators can lower your boiler’s pressure. Check the pressure gauge—it should be between 1 and 2 bars when cold. If it’s too low, top it up using your boiler’s filling loop (consult your manual or call My Home Services for help).
- Turn Heating Back On: Once done, switch your heating back on and feel the difference!
Pro Tips from My Home Services
- Bleed radiators annually, ideally before winter hits.
- If radiators still don’t heat properly, you might have sludge buildup—our Croydon team can power-flush your system to restore performance.
- Always double-check the valve is fully closed to prevent leaks.
Why Trust My Home Services?
At My Home Services (myhomeservices.co.uk), we’re Croydon’s go-to experts for heating and plumbing. Bleeding radiators is a great DIY task, but if you’re unsure or spot bigger issues like leaks or persistent cold spots, our skilled engineers are here to help. A well-maintained radiator isn’t just about warmth—it’s about efficiency, savings, and peace of mind. Call us today to keep your Croydon home cosy all year round!



