How do I Repressurise my Worcester 28cdi boiler?

How to Repressurise Your Boiler Using an Internal Filling Key

Locate the internal filling key.
Locate the arrows of the key.
Locate the manifold.
Locate the padlock symbols.
Push the key into the manifold.
Let water into the appliance’s system.
Check the pressure gauge.
Lock the internal filling key.

Can I leave the filling loop on my boiler?

If it’s left on, you can cause irreparable damage to your filling loop boiler. They can accidentally knock the filling loop valves, which would allow water to flow back into the system, raising the boiler pressure and cause more problems.

How do I remove the filling key from Worcester boiler?

Locate the internal filling key. On the underside of your Worcester boiler there should be a white plastic tray.
Locate the arrows on the key.
Locate the manifold.
Locate the padlock symbols.
Push the key into the manifold.
Allow water into the system.
Monitor the boiler pressure.
Remove the internal filling key.

Why is my Worcester Bosch 28cdi filling loop dripping?

Our Worcester Bosch 28cdi Combi boiler (about 10 years old) has developed a fault where water is dripping from underneath drop by drop. I’m definitely not going to touch it to fix myself, but I’m looking for advice as in what are my options here.

Can a Worcester Bosch filling loop be used in a GreenStar boiler?

A genuine Worcester Bosch spare, this filling loop is compatible with Greenstar boilers. For use in central heating boilers and systems, allowing the user to manually top-up the amount of water in the system if the pressure drops.

What kind of filling key does Worcester Bosch use?

WB supply a complete new filling assembly that is slightly different to the original but does fit and includes a new filling key. You do need to dig out that piece of black plastic though, and be very careful not to scratch the brass, as that’s where the o ring seals to. Click to expand…

Can a filling loop be removed from a central heating system?

For use in central heating boilers and systems, allowing the user to manually top-up the amount of water in the system if the pressure drops. External loops are usually removable in keeping with regulations, while internal filling loops normally feature a key that can be removed to interrupt the connection after use.