Accurately learn to Re-pressurise your Boiler | AMW Heating

Learn to Re-pressurise your Boiler

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How to re-pressurise boiler

Read this guide and learn how to re-pressurise your boiler

Bleeding your radiator means letting out any trapped air inside. It’s a simple way to help your heating work better. This guide will take you through how to safely bleed your radiators and re-pressurise your boiler. If you’re unsure about anything, don’t hesitate to get professional help.

Re-pressurise your boiler

Keyless Filling Link

  • If the pressure gauge needle is below 1 bar, you’ll need to re-charge the system.
  • Pull the blue lever down to start filling the system with water.
  • Keep an eye on the pressure gauge as it fills.
  • Once the needle reaches between 1 and 1.5 bar, let go of the blue lever to stop filling.

    • Keyless filling link

    Integral keyed filling link

    Locate the filling key and follow these steps to re-pressurise your system:

  • Push the filling key firmly into the filling link, making sure the arrow on the key shaft aligns with the open padlock symbol.
  • Turn the key to the right until it stops. Ensure the key is fully locked and cannot turn further. The arrow should now point to the closed padlock symbol, connecting the two parts of the filling loop.
  • Turn the white knob to the left to allow water to fill the system.
  • When the pressure on the appliance fascia gauge reaches between 1 and 1.5 bar (zone A), turn the white knob to the right to close the valve. Avoid overtightening.
  • Turn the filling key to the left until it stops, aligning the arrow with the open padlock symbol, then pull the key straight down to remove it. Remember to store the key in the bottom panel.

    • Integral keyed filling link

    Does your boiler lose pressure daily?

    If your boiler keeps losing pressure and you’re topping it up regularly, that’s not normal. Before you start looking for leaks, check your pressure gauge while your heating is on.

  • Does the pressure gauge rise to a high level before your heating begins to cool down?
  • Is there a copper pipe on an outside wall that’s dripping or spraying hot water?

    • If you notice one or more of these signs, your boiler’s expansion vessel might need recharging or replacing. This must be carried out by a Gas Safe registered engineer, this fault is very common across all boilers brands. Boiler servicing should include to check and recharge your expansion vessel, so this fault could be repaired by getting your boiler serviced.

    Get your boiler serviced by AMW Heating & Plumbing. Get in touch with our friendly team today!