Brown cental heating water

[cheshireblue12]

Decided to check the colour of my central heating (heating ) water.
After circulating then sampling the water (at the radiator drain off) water come out a transparent light brown colour without any solids.
I am a bit concern that this may be due to build up of corrosion. I was thinking of draining then adding X400 running for a few days draining then add inhibitor.
The boiler is a condensing combi.
Any thoughts /help gratefully appreciated.

 

[Mottie]

This might be over the top and I’m sure I’ll be corrected very quickly but when I flushed my system prior to adding x400 in it, I changed the water a few times first, then added the x400, run it for a while and then flushed it several times before adding inhibitor. If you have the time and are capable, I’d suggest taking each rad off and flushing it through with a hose (in the garden) to clear out any sediment. Flush, shake, repeat until running clear.

 

[ianmcd]

If you have plastic pipe in the system it sometimes causes brown system water

 

[cheshireblue12]

Thanks for the reply was hoping to get away from having to remove all the radiators, but dont want to have corrosion problems either, hence drain the flush with X400 idea.

 

[cheshireblue12]

Pretty sure all pipework is copper

 

[ReganAndCarter]

Slightly coloured system water isn't a problem. I would drain down and refill, and add bottle of corrosion inhibitor at the same time. While drained down, fit a magnetic filter (eg. Maglaclean Pro 2) to boiler's return pipe - and all your worries are over.

 

[breadnbutter]

I think fernox do water tests, send them sample.
how old is system, and last work done on it, some inhibitors do discolour water slightly

 

[cheshireblue12]

Cheers thanks for reply, may struggle to get a mag filter into the return with the limited room I have, could I get away with drain and lush as a yearly routine ?

 

[cheshireblue12]

boiler is about 2 years old 4 of 7 radiators are new within the last 2 years

 

[breadnbutter]

the discolourisation might of come from new rads. as they idealy should be flushed out after installation..

get a water sample, send fernox, save you lots of trouble, then you will know what is happing whith sytem.

 

[cheshireblue12]

thanks will look into getting a sample and send off for analysis