Corrosion in a sealed central heating system

[AlexCSB]

I've just treated my sealed CHS with Fernox heavy duty restorer to cure some kettling noises from the boiler. As advised I've now drained and refilled the system 5 times but still the water coming out is a cloudy light brown colour.

I'm beginning to wonder if this maybe due to corrosion even though the system is only 3 or 4 years old.

If this is corrosion, what is the best thing to do to minimise its effects (don't fancy replacing rads etc.). I was thinking of putting a leak sealer plus a couple of doses of inhibitor into the system in order to slow things down as I don't suppose there is anyway to actually stop it easily.

 

[kevplumb]

sounds more likley you havent got all the restorer out

 

[Nige F]

If installed from new and cleaned properly...dosed with Fernox, and the strength of the solution checked once a year..........20 years with no corrosion and on the same pump