How to Check Your Boiler Pressure

Maintaining the correct pressure in your boiler is essential for efficient heating and hot water. Low pressure can lead to radiators not heating up fully, while high pressure can strain the system. Here’s how to check and adjust your boiler pressure safely.

Materials Needed:

• Boiler manual (optional, for specific guidance)
• Flathead screwdriver or adjustable spanner (if adjusting pressure)

Step-by-Step Instructions:

1. Locate the Pressure Gauge
   • The pressure gauge is typically located on the front of your boiler. It shows the current pressure in bars, with most systems operating best between 1.0 and 2.0 bars.
2. Check the Gauge Reading
   • When the heating system is off and cool, check the pressure gauge. Ideally, the needle should be around 1.5 bars. If the reading is below 1.0, the pressure is too low. Above 2.5 bars means the pressure is too high.
3. Adjust the Pressure if Necessary
   • Low Pressure: Locate the filling loop, often a silver flexible hose underneath the boiler with a valve on either end.
     • Open the valve(s) by turning them slowly to allow cold water into the system.
     • Watch the pressure gauge as the needle rises, and stop when it reaches 1.5 bars. Close the valve tightly.
   • High Pressure: If the pressure is too high, you can bleed one of the radiators to release excess water. Check the pressure again after doing this.
4. Reset Your Boiler (If Needed)
   • Some boilers require a reset after adjusting the pressure. Follow your boiler manual for guidance on how to reset it if needed.
5. Turn on Your Heating
   • After adjusting the pressure, turn your heating system back on and check that the radiators are heating evenly. Monitor the pressure gauge to ensure it stays within the ideal range.

Additional Tips:

• Check your boiler pressure every three months, especially before the heating season begins.
• Regularly maintaining boiler pressure can help prevent system breakdowns and prolong its lifespan.