Fernox F1 Central Heating Protector - 265 ml / Yellow

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Fernox protector F1 265 ml gives long-term protection against internal corrosion and limescale formation in central heating systems. Suitable for all types of boilers, radiators and pipework systems, Fernox protector is compatible with all metals and materials commonly used in central heating systems, including aluminium.

Part of the Fernox tried and trusted Protector F1 range, 265 ml product offers reduced packaging and waste without compromising on high performance, quality and ease of use. Conveniently size bottle can treat an average 100 L system or 12 radiators and maybe dosed via a TF1 filter.

To comply with BS 7593:2019 and best practice, Protector F1 levels should be checked annually as part of the maintenance service. The concentration of the product to ensure full protection can be easily measured on-site using a Fernox protector test kit or by using the Fernox water quality test postal service, with samples submitted via a mobile app.

BS 7593:2019 also states that after five years, systems should either be re-dosed with inhibitor or the quality/ cleanliness of the system water checked by a laboratory test, such as the Fernox water quality test.

If you protect a central heating system using Fernox Protector F1, after cleaning with Fernox cleaner F3, you can restore and maintain system efficiency resulting in a gas saving of up to 15% every time you heat your room.

  • Capacity: 265 ml
  • Height: 148 mm
  • Width: 60 mm
  • Depth: 47 mm
  • Form: Liquid
  • Odour: Aromatic (slight)
  • Colour: Yellow
  • pH(conc.): 8.1
  • pH(soln.): 7.0 to 8.0
  • SG: 1.18 at 20°C
Application, Fitting & Dosing:

The recommended in use concentration of the product is 0.265%. One 265 ml bottle will treat an average domestic system (100 L). For open vented systems add via the feed and expansion tank. For sealed systems add via a suitable dosing point (e.g. a towel rail or an in-line TF1 system filter). Alternatively, use a suitable dosing vessel to inject the product into the system. In single feed indirect cylinders, e.g. Primatic or similar, potable water chemicals must be used. Fernox recommends untreated or sludged systems are thoroughly cleaned and flushed in accordance with BS 7593:2019 and Benchmark using any product from the Fernox Cleaner range, before treating with Fernox Protector F1, as existing debris can damage the installation and may reduce the lifespan of the boiler and system.

Package, Handling & Safety:

Fernox Protector F1 is supplied in 265 ml bottles. Fernox Protector F1 is classified as non-hazardous for human health, but as with all chemicals, keep out of reach of children. In case of contact with eyes or skin, rinse immediately with plenty of water. Protector F1 is a blend of inorganic and organic corrosion and scale inhibitors.

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More Information
Height 148mm
Brand Fernox
Width 60mm
Volume 265ml
Colour Yellow
Category Sealers & Compounds
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