Product Description 

Protect your system from rust and debris by installing the Worcester Bosch Greenstar system filter, 22mm, and help to increase the boiler's lifespan.  

This system filter can even help reduce running costs according to independent research carried out by GASTEC at CRE.  

It's also designed for simple operation with red and green indicators showing when the filter is in operation.  

Designed to be installed anywhere along the return circulation pipework between the last radiator and the boiler, this filter is engineered to allow for bi-directional flow.  

This helps it to effectively protect your whole system from rust and solder fragments.  

With improvements inspired by installer feedback, this filter is designed to make installing and servicing even easier.  

The removable lid has also been engineered to prevent over-tightening which stops damage to the o-ring seal, avoiding any risk of leakage.  

It also features easy-to-use isolation valves, activated by a simple 90° turn.  

Product Features 

The removable lid has been designed to prevent over-tightening and damage to the o-ring seal 

Eliminating the risk of leaks 

The isolation valves can be activated using a single 90º turn 

With red and green indicators showing when the filter is in operation 

Engineered to allow a bi-directional flow 

Enabling it to be installed anywhere along the return circulation pipework between the last radiator and the boiler 

A larger powerful internal magnet safeguards the boiler and wider system components