Can I repressurise my own boiler?
Yes, you can repressurise your own boiler, provided you feel confident and understand the process. Repressurising a boiler is usually straightforward and is often necessary if the pressure gauge on your boiler has dropped below the recommended level (typically 1–1.5 bar when the boiler is off). Here’s how you can do it:
Steps to Repressurise a Boiler
Turn Off the Boiler:
Before starting, switch off the boiler and allow it to cool down completely for safety.
Locate the Pressure Gauge:
Find the pressure gauge on your boiler. It usually shows the current pressure in bars. If it’s below 1 bar, it needs repressurising.
Find the Filling Loop:
Locate the filling loop. This is a small, flexible metal hose with a valve or tap on either end, often underneath the boiler.
Open the Valves:
Slowly open one of the filling loop valves, then the other, allowing water to flow into the boiler. Keep an eye on the pressure gauge as it starts to rise.
Watch the Pressure:
Stop filling once the gauge reaches 1–1.5 bar. Be careful not to overpressurise, as this could damage the system.
Close the Valves:
Close both valves tightly once you’ve reached the correct pressure. Remove the filling loop if it’s detachable.
Restart the Boiler:
Turn the boiler back on and check if it operates correctly.
Important Notes:
Check Your Manual: Your boiler’s user manual may have specific instructions for repressurising. Always follow those if available. We have added boiler manual links for the three most popular boilers that we deal with below.
Fix the Cause: Low pressure can indicate a leak or other issues. If the problem persists, contact us today.
Be Cautious: If you’re unsure or uncomfortable, it’s better to call our Gas Safe registered engineers.
