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worcester bosch central heating manchester Don’t get left out in the cold this winter central heating systems


· Central Heating Protector for mixed-metal domestic central heating systems

· Protects against corrosion and limescale

· Prevents boiler noise

· Stops frequent venting of radiators

· Extends system life

· Prevents sticking pumps

· Saves on fuel bills

· Reduces maintenance costs

· Maintains system efficiency

· Prevents cold spots in radiators

· Non-toxic, environmentally friendly  


Product Uses

Fernox Protector MB-1 gives long term protection of domestic central heating systems against internal corrosion and limescale formation. It prevents corrosion of all metals found in these systems, i.e. ferrous metals, copper and copper alloys and aluminium. It is suitable for all types of boiler, radiators and pipework systems. Fernox Protector MB-1 is compatible with all metals and materials commonly used in central heating systems.

For continued protection we recommend Protector levels are checked regularly (annually).






The concentration of the product can be easily measured on site using a Fernox Protector test kit.

Physical Properties

Protector MB-1 is a blend of inorganic and organic corrosion and scale inhibitors and biocide.

Colour: Pale. Amber.

Odour: Faint

Form: Liquid

pH (conc.): 8.3 – 8.8

pH (4% soln): 8.2 – 8.6

SG: 1.025 at 20°C


Application and Dosage


The recommended ‘in-use’ concentration of the product is 4%. One 4 litre pack will treat an average 3 to 4 bedroom house. The product can be introduced via the feed and expansion tank or injected directly into the system via a radiator or filling loop.

In single feed indirect cylinders, e.g. "Primatic" or similar, potable water chemicals must be used.

We recommend untreated systems are thoroughly cleansed and flushed in accordance with BS7593 and Benchmark using Fernox Restorer, before treating with Fernox Protector MB-1, as existing debris can damage the installation.

Packaging, Handling and Storage

Fernox Protector MB-1 is supplied in 4 litre and 25 litre containers.

Fernox Protector MB-1 is classified as non-hazardous, but as with all chemical: Keep out of reach of children. Do not mix with other chemicals. Do not take internally. In case of contact with eyes or skin, rinse immediately with plenty of water.


worcester bosch central heating manchester

To find out which boiler will suit your needs call 0800 007 64 64

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