Sludge in new central heating system

avril123

Can somebody please help. We have had a complete new central heating system installed including all pipe work with a combination boiler. There is build up of black sludge in the magnetron and it is damaging the heat exchanger. This is occurring in less than a week and nobody seems to have any idea why.

The installers cannot understand it and the only thing they suggest is that it might be a faulty radiator. All the radiators are new as is the pipework. Nobody seems to have an answer and I am going crazy.

Please somebody help!!!! Any answers would be gratefully received

adonis

I am not a gas fitter, but did you have an inhibiter put in the system to stop corrosion.
I know it is a new system but it might help to stop the sludge build up.

avril123

Yes we did have an inhibitor put in but not sure how much is left as I think the system was drained afterwards.

adonis

If you don't get any ideas from any of the gas fitters that post on here. it might be worth ringing a company like fernox who do heating additives, to see if they know what is causing it.

Yorksboy

Was the new system flushed before the boiler was installed. Assuming all the pipe work is copper and the joints soldered then there is a build up of flux and solder in the pipes after soldering. I guess that new radiators also have some detritus in them.

DVardysShadow

avril123 wrote: »

Yes we did have an inhibitor put in but not sure how much is left as I think the system was drained afterwards.

Drain down again, refill and add inhibitor.

Owain_Moneysaver

Drain down, put in system cleaner and pump the system. If the pump is in the boiler, disconnect the boiler and use a temporary pump.

Then drain, rinse, and refill with inhibitor.

andygb

I am not in the trade, but from a common sense point of view, I find it incredible that someone would not flush the system and then use inhibitor before fitting a new boiler/system.

Canucklehead

Hi.

You have a new system ,but, are you certain that all the rads and pipework are brand new?

The Magnaclean is doing it's job therefore the boiler should not be damaged.( It is fitted to the c/h return isn't it?)

Who thought to take the Magnaclean apart after only a week and why? Are you suspicious of something?

If the system was drained down after inhibitor was added then clearly there is no inhibitor in the system. Or are you mistaken?


Has the pipework been done in plastic? Is it barrier pipe?


A new system with inhibitor added (even not flushed ) should not produce magnatite.


GSR.