If your Worcester Bosch boiler is losing pressure, you might notice your heating system not working as efficiently as it should. Don’t worry—re-pressurising your boiler is a straightforward process you can handle at home with a little guidance.
This step-by-step guide will walk you through re-pressurising your Worcester Bosch boiler safely and effectively.
Why Do Boilers Lose Pressure?

Boiler pressure can drop for several reasons, including:
- Small leaks in the system
- Bleeding radiators
- Faulty components
If you notice the pressure gauge reading below 1 bar, it’s time to re-pressurise your system.
What You’ll Need
Before starting, gather the following items:
- A filling key (usually provided with your boiler)
- Access to the filling loop
Step-By-Step Guide To Re-pressurise Your Boiler
- Turn Off Your Boiler
Switch off the boiler and allow it to cool down for safety. - Locate The Pressure Gauge
Find the pressure gauge on the boiler’s control panel. Ideally, the pressure should be between 1 and 1.5 bar. - Find The Filling Loop
Locate the filling loop—this is usually a silver, flexible hose beneath the boiler. - Insert The Filling Key
If your boiler uses a filling key, insert it into the designated slot and turn it to unlock. - Open The Valves
Slowly open the valves on the filling loop. You’ll hear water flowing into the system. - Monitor The Pressure
Keep an eye on the pressure gauge and close the valves once the needle reaches the recommended level (around 1.5 bar). - Remove The Key And Check For Leaks
Remove the filling key, tighten the valves, and check the system for any leaks. - Turn The Boiler Back On
Switch the boiler back on and check its performance.
Worcester Bosch Boiler Maintenance with Hale Heating
Re-pressurising your Worcester Bosch boiler is a task many homeowners can handle themselves, but recurring pressure issues might indicate a deeper problem. Instead of risking further complications, why not let the professionals handle it?
At Hale Heating & Renewables, we offer fast, reliable boiler repairs and maintenance to keep your heating system running smoothly. Contact us today to schedule a service and experience hassle-free heating care from the experts you can trust.
