central heating inhibitor

[nospam]

Hello,

Whilst in the loft I noticed that the water in the CH header tank was murky and foul smelling. There was also something orange on the water line: either a deposit or a fungus?

I'm pretty sure it's not supposed to be like this! I put a bottle of Sentinel inhibitor into the tank when I moved in, so I thought I would have been protected? What should I do: should I drain down and refill and use two bottles next time? What is the orange likely to be? Surely copper compounds are usually green or black? I'm thinking iron compounds are orange: oh oh!

Thanks.

[leighhales]

Hello,

The orange colour will be a mixture of oxidised metals (rust for ir> Hello,

[nospam]

Thanks for the reply. I added one bottle of sentinel when I moved in and at that time I did drain down and refill, so I am surprised that the tank has gone like this. I seem to remember that the inhibitor was a yellow colour, so surely I should have a yellow water in the tank, not the murky horrible water I have now?

Do you recommend a full drain down and refill again? If so, should I use two bottle of sentinel next time? Is Fermox any better?

Thanks.