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Fernox F1 Express Central Heating Inhibitor & Protector 265ml

Product Code: 13159

You must be over the age of 18 to purchase this product.

Protects against corrosion and limescale. Treats up to 10 radiators. Quick and convenient, doses in only 30 seconds. Stops frequent venting of radiators. Maintains system efficiency and extends boiler life.

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Product contents:
Radiator and filling loop adaptors.

Delivery unavailable for any offshore location.

pH (concentrate): 7.8-8.5.

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Safety Data Sheet (COSHH)




QtyPrice per item
1 - 2 £25.99 (£98.08/Ltr)
3 + £23.38 (£88.23/Ltr)

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Rated 4 out of 5 by Sealed system inhibitor Only recently started using this for sealed system and it's great. A bit pricey though. 16 Jan 2016
Rated 5 out of 5 by Great product. Unbelievably easy to use if you have a filling loop as I did. It was so quick to do that I thought it hadn't gone in at first, but the can had gone ice cold so it obviously had! 28 Oct 2015
Rated 5 out of 5 by Super easy. Really good product, coming from Fernox you know it's good quality. This product is so simple to use and the contents of the can are fed into the heating system really quickly. I used it via the filling loop, but there's also an adaptor to fil via a radiator. 1 Oct 2015
Rated 5 out of 5 by Great Stuff Without doubt a very easy way add inhibitor to my central heating system. Just connect to the pipe at the boiler, job done! I used the same product last year and when installing a new radiator in my home the drained water was clean with no sign of corrosion. Will certainly buy again. 20 Jul 2015
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1 Question  1 Answer

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25 Oct 2015
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Hello Steve, this will be fine to add via the header tank.
3 Nov 2015
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Download more info (pdf)

Brand Fernox
Colour Blue
Manufacturing Standards Complies with Part L of the Building Regulations.
Model No F1 Express
Pack Size 1
Pieces in Pack/Case 1
Product Depth 50 mm
Product Height 210 mm
Product Type Central Heating Inhibitor & Protector
Product Width 50 mm
Sealant Adhesive Volume 265 ml
Total Product Weight 0.48 kg
Volume 265 ml