This filter is an essential addition to your heating system, expertly designed to effectively remove debris and pollutants, thereby shielding boilers and heat pumps from potential damage and significantly extending their lifespan.

This 28mm System Filter maintains the exceptional features and benefits expected of Worcester Bosch. With a commitment to outstanding engineering, the filter ensures superior system protection with its high-powered internal magnet and straightforward installation process. This advanced filter is ideal for any homeowner looking to enhance their heating system's efficiency without incurring exorbitant costs. Its brass construction exemplifies durability, and it is compatible with all boiler systems, making it a versatile solution for system maintenance. By capturing a substantial amount of magnetic debris, it not only protects critical components but also helps save money by reducing the need for costly repairs and replacements. The Greenstar System Filter is the perfect investment for maintaining a clean and efficient home heating environment.

Product Details:

  • Size: 28mm, ideal for larger systems
  • High-quality engineering for efficient protection for easy installation
  • Powerful magnet captures magnetic debris effectively
  • Protects boilers and heat pumps from system damage
  • Saves on costly repairs and replacements
  • Compatible with all boiler systems for versatility
  • Simple installation and maintenance ensure ease of use

£4.99 Standard Delivery, or FREE on most orders over £99* (some exclusions apply)

£9.99 Next day delivery is available for orders places before 12 noon. Any orders placed for next day delivery after this time, will take 2 working days to be delivered.

Working/delivery days are Monday to Friday, deliveries will not normally be made Saturday or Sunday.

We offer a 30-day returns policy on on the majority of our items*, as long as the item is unused, undamaged and unopened**. We only ask that the postage is covered by yourself. 


* Please see our delivery page for further details on specific exceptions.

** Some products that are made to order or personalised cannot be returned.

***Exclusions apply for items shipped directly from our suppliers, and some big & bulky items may incur an additional charge. Please see our delivery page for full details. 

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Worcester Bosch Greenstar 28mm System Filter - 7733600237

  • $371.68
  • (FREE UK Delivery)
Item in Stock   |   Usually dispatched within 24 hours
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Free UK Delivery on most orders over £99
Delivery Rates & Information

Delivery Options

Standard Delivery: £4.99 - Free for all orders over £99.*
Next Day Delivery: £9.99 - Available for orders placed before 12:00 PM (Noon).

Important Delivery Notes

Next Day Delivery Cut-off: Orders placed after 12:00 PM (Noon) using Next Day Delivery will be delivered within two working days.
Working Days: Our standard delivery and shipping days are Monday through Friday. We do not normally deliver on Saturdays or Sundays.

Easy 30-Day Returns

We want you to be happy with your purchase! We offer a 30-day returns policy on all items, provided the following conditions are met:
  • The item is unused and undamaged.
  • The item is returned in its original packaging.
  • The customer is responsible for the return postage costs.

Combining Your Order

We always strive to combine your order into a single delivery. However, your order may arrive in multiple shipments if it contains:
  • Items from different warehouses (Standard items).
  • 'Direct' items (These are shipped separately and directly from the supplier) and will arrive separately from other items in your order.

*Exclusions & Additional Charges

The following items may be excluded from standard shipping rates or may incur extra delivery charges:
  • Items Shipped Directly from Suppliers ('Direct' items).
  • Certain Large or Bulky Items.
Want it by Thursday 15th October? Order within 9 hours, 51 minutes