Worcester Boiler Greenstar Intelligent Filling System

The Genuine Worcester Greenstar Intelligent Filling System automatically maintains the correct pressure in your boiler, removing the need for manual filling and helping to prevent low-pressure faults.If the system becomes faulty, you may experience pressure loss, error codes, or the need to frequently top up the boiler. Replacing it restores reliable pressure control and ensures efficient, hassle-free operation. Installation should always be carried out by a qualified engineer.

Compatibility

• GR4700iW : 25C LPG, 25C NG, 30C LPG, 30C NG

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQs)

1. What is the Greenstar Intelligent Filling System?
If the system pressure becomes low, this revolutionary software allows the internal filling valve to automatically fill the heating system. Once optimum pressure has been reached, this function will automatically stop and close the integrated filling valve.

2. What should the pressure be on a Worcester Greenstar boiler?
between 1.0 and 1.5 bar
What Should the Pressure Be on a Worcester Greenstar 1000? When your boiler is cold, the pressure should normally be between 1.0 and 1.5 bar. If the pressure drops below 1 bar, your boiler may: Stop working.

3. How does an automatic filling loop work?
Central heating filling loops on the surface are hoses that link your boiler to the main water supply on a temporary basis. It helps to depressurise the boiler when bleeding or draining the system whilst topping it up with water.

4. How many radiators can a Worcester Greenstar run?
CH output of 30kW and DHW output of 30.2kW, Worcester Bosch’s Greenstar 8000 Life 30kW model is suitable for houses with up to 15 radiators and more than 1 bathroom.

5. Can I adjust water pressure myself?
The screw acts as a water pressure regulator. If you tighten the screw the water pressure will be more and if you loosen the screw the water pressure will be less. Turn the screw clockwise to tighten it and increase the pressure, or turn it counterclockwise to decrease the pressure. Do not be too hasty.