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Product Details

Inhibitor which protects against corrosion and limescale formation in domestic central heating systems.

Technical Specification
Brand Fernox
Safety Data Sheet click here
Volume (L) 0.265
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 10 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 8pm Mon-Sat (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Fernox F1 Central Heating Inhibitor & Protector Express 265ml is rated 4.9 out of 5 by 7.
Rated 5 out of 5 by from Self Contained and Easy This is the second time I've used this product - for good reasons! Aerosol simplicity - connect the cartridge to either the combi boiler filling loop or a convenient rad. bleed point, using the supplied connectors and pull the trigger. Ten to fifteen seconds later the job is complete. I removed the Magnaclean magnet for cleaning (did this a year ago) and very little residue - Good product Fernox
Date published: 2019-06-19
Rated 5 out of 5 by from Ease of use Make sure rad empty before commencing as the pressure from the aerosol is powerful, much easier to use than other container
Date published: 2019-05-19
Rated 4 out of 5 by from Easy to dose Central Heating System Supplied with three attachments, allowing fitment to either the air valve of a radiator, a radiator blank or the filling loop of a combi-boiler. Having chosen the latter to use, was very easy to attach, get a decent seal, and dose the system. No spill, no mess. Costly in comparison with other quantities, but the convenience outweighs the cost.
Date published: 2019-04-21
Rated 5 out of 5 by from Rapid My van is so much faster now after adding this to to tank
Date published: 2019-04-15
Rated 5 out of 5 by from Reputable Make The product seems to be doing its job. Only time will tell.
Date published: 2019-02-20
Rated 5 out of 5 by from Very Handy I bought this just to top up the concentration in the central heating as I removed 2 radiators to decorate our 2 rooms. It was so handy it comes with a variety of connections for the radiator. When I refitted the radiators I unscrewed one of the top radiator plugs screwed in the connector squeezed the leaver for a few minutes and then refilled the system and bled the air out.
Date published: 2019-02-20
Rated 5 out of 5 by from Very quick 'n easy application Couldn't use the rad bleed valve adaptor as it failed to seal (it self taps) properly, but 1/2" BSP adaptor to filling loop worked a treat. Job done in 2 minutes. I've used Fernox inhibitor previously and water still clear after many years use. Good price by Toolstation.
Date published: 2019-02-06
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