![](https://fernox.com/wp-content/uploads/sites/5/2024/05/62631_TF1-Sigma-UB-Filter.jpg)
TF1 Sigma UB Filter
Composite under boiler system filter with a brass manifold designed for easy installation in small, restricted areas and with concealed
Restricted spaces are a thing of the past with our new efficient and compact in-line system filter, for those harder to reach spaces and ideal for smaller systems.
Available in 22mm Slip Socket connection and comes with a 10-year warranty.
60 years of innovation
60 years of sustainability
60 years of expertise
60 years of innovation
60 years of sustainability
60 years of expertise
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Fernox has gone XL
Fernox has gone XL
Fernox has gone XL
Fernox has gone XL
Fernox has gone XL
Fernox has gone XL
THE EXTENDED COMMERCIAL RANGE
Fernox has gone XL
Fernox has gone XL
Fernox has gone XL
THE EXTENDED COMMERCIAL RANGE
Approved for use by all major boiler manufacturers – one bottle treats up to 97% of UK homes.
Super-strength, fast-acting citrate cleaner.
Neutraliser not needed, providing rapid results.
Composite under boiler system filter with a brass manifold designed for easy installation in small, restricted areas and with concealed
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