Water Treatment F1 Protector Express 400ml Fernox
Protect your heating system with Fernox F1 Express. Doses in 30 seconds without draining to prevent corrosion, limescale, and extend boiler life.
Watch this product and we will notify you once it is back in stock.
Water Treatment F1 Protector Express 400ml Fernox
Description
Extend the life of your heating system and reduce your energy costs. Fernox Protector F1 Express is a high-performance inhibitor designed to provide complete, long-term protection against corrosion, rust and limescale deposits in central heating and underfloor heating systems. Thanks to the innovative aerosol packaging, the liquid is dosed in under 30 seconds directly into the system - without you having to drain the water first.
Benefits of Fernox F1 Express
- Quick and easy application: Dispenses in just 30 seconds via radiator valve, filling loop or Fernox TF1 filter. No draining required.
- High capacity: One bottle (400ml) is sufficient for systems up to 130 litres of water, which is equivalent to approximately 16 radiators or 250m² of underfloor heating.
- Protects all metals: Safe for all materials in modern and older heating systems, including steel, copper, brass and aluminium.
- Advanced triple action protection: Combines organic, anodic and cathodic inhibitors that seal metal surfaces and bind limescale.
- Optimised pH buffer: Keeps the pH of the system water stable between 7.8 and 8.5 to minimise the risk of corrosion.
- Meets manufacturer warranties: Approved and recommended to standards such as BS 7593:2019 and Benchmark.
- Environmentally friendly and safe: Non-toxic, non-flammable and certified by NSF CIAS, KIWA and Belgaqua.
Instructions for use and dosage
- Preparation: In case of heavily clogged or older systems, cleaning with Fernox Cleaner F3 Express is recommended before adding F1, to maximize the effect and save up to 15% on heating costs. Empty any particle filter (e.g. Fernox TF1) of dirt before dosing.
- Connection: Mount the supplied adapter at the selected dosing point (air vent valve on radiator, filling loop or service port on magnetic filter).
- Injection: Press F1 Express into the system. The entire can is emptied in approximately 30 seconds using clean compressed air - without the risk of oxygen entering the system water.
- Maintenance: Check the concentration annually in connection with regular boiler service to ensure continuous protection.
Note: Not for use in primary drinking water systems with single jacketed boilers (e.g. older Primatic cylinders) where system water may be mixed with tap water.
Safety And Handling
- Fernox Protector F1 Express is classified as non-hazardous to human health.
- Keep out of reach of children.
- In case of contact with skin or eyes, rinse immediately with plenty of clean water.
Specifications
- Product volume: 400 ml
- Type: Aerosol (Barrier Pressure Pack with clean compressed air)
- Coverage: Up to 130 liters (approx. 16 radiators / 250 m² underfloor heating)
- Compatibility: All metals including aluminum, as well as plastic pipes (PEX, etc.)
- Form and Color: Light yellow liquid
- Odor: Slightly aromatic
- pH (concentrated): 8.4
- pH (in operation): 7.8 – 8.5
- Density (SG): 1.17 at 20 °C
- Certifications: NSF CIAS, KIWA, Belgaqua

