Adey MC1 Central Heating System Protector, 500ml, is an advanced system inhibitor from the UK’s No.1 manufacturer of magnetic filters. It prevents system corrosion and scale and is suitable for all sealed and open vented central heating systems. The new formula has been specially developed to deliver exceptional results when used in conjunction with ADEY’s market leading MagnaClean® domestic filter range. How to Use: This 500 ml bottle will provide effective treatment for a typical 100 litre/ten radiator system, for larger systems, use further bottles of MC1 as required, to introduce MC1 to the system, Following a Magnacleanse flush, for fast and effective results we recommended using the MagnaClean canister to dose the system. Alternatively dose via a radiator or the F&E tank, N.B NOT for use in single feed indirect cylinders Environmental: ADEY is a carbon neutral company and cares about the environment, MC1 is classified as non-hazardous and while delivering effective protection against corrosion and limescale is non-toxic and biodegradable.