DIYbanter - View Single Post - British Gas 'PowerFlush' any good or shall I DIY?

In article ,
says...
Hi all,

Have just had the bladder, vessel, release valve, hose and some radiator
lockshields changed by British Gas, because they were totally blocked by
sludge. The water came out fairly blackish with bits in it.

I had invested in a tube of X400 to remove the sludge, then some X100 to use
as an inhibitor. I told the Gas man this and he said:

"Don't use the X400 on this system, it will turn the sludge to concrete."

Is he talking a lot of 'gas' and trying to sell me their £400 PowerFlush
instead, or does he have a point?

Basically how can I do this on the cheap, without creating concrete.

I'm sure the powerflush is good and it will work. £400 sounds quite
cheap to me as they quoted me about £800. Anyway I'm doing it myself
using Fernox. I drained the entire system yesterday several times until
the water came out clear. I also had to clean the header tank as it was
full of brown stuff. I put the cleaner in and (rather disconcertingly) a
few radiators downstairs didn't heat up and I ended up turning all the
other radiators off just to get the pump pumping round the radiators
that were blocked - this worked. However this morning a couple of
radiators wouldn't go again so I turned off the upstairs and the
downstairs seems to be okay at the moment. Does anyone know if I'm
causing permanent damage doing this? I was going to leave it in for a
week (it says you can on the bottle) and then drain it on sunday but I
may drain it all on friday if I can get a day off work.

Then I'll stick the inhibitor in and hopefully say goodbye to these
problems.

--
John Kelly

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