Flushed twice......water still dirty (CH problem)

[kiteman69]

Hi.

I have a 10 year old potterton Suprima 40l (connected to a mains pressure system (barratts house))

It was working fine for years, but over the passed few months it is doing my head in. (needing constant resets)

It started off by becoming very noisy so I drained the central heating system by turning off the stopcock, attaching a hose to each of the downstairs radiators (there was a drain point on each of them) and the water that came out was black (but not sludgy).

I then refilled the system, and bled it, and all was OK for about 2 weeks.

The problem however started again so I gave it another drain and the water again was black.

Is this correct or am I missing a vital something.

If it is correct, do I have to do this a few times to thoroughly clean the system

Thanks in advance

 

[Agile]

It seems that you have not bothered to add a sludge removing chemical!

X800 for same day action!

X400 for 4-6 week treatment!

Tony

 

[gavinda]

Plus you really need to drain and refill a couple of times to have a hands of doing a decent job of it. Consider having a heating filter added as well, this could do a bit of the work for you.

 

[kiteman69]

Thanks for the quick responses

Tony, I was concerned about adding any chemicals, as I once did a radiator flush on an old ford escort.

The stuff I put through found all the little holes and cleaned them out for me ........ resulting in me having to buy a new radiator


Could this happen with any of the joints in the system?

I assume this is what you mean

http://www.screwfix.com/p/sentinel-x800-heavy-duty-sludge-remover-1ltr/84921

Do you agree with the review enitled " Sentinel X800 (Brilliant) "

Thanks once again

 

[JohnD]

your heating system should not have holes in it. If it does, the faulty part needs to be replaced.

As well as using a sludge-loosening chemical, if there is much dirt in your system you would benefit from fitting a filter to trap the remaining circulating particles before they can cause another blockage. For example http://www.screwfix.com/p/fernox-tf1-total-filter-22mm/84311
The Magnaclean products however are notorious for leaking.

There are other good makes, such as Spirotech, at similar prices.

Don't forget to add a corrosion inhibitor such a X100 when you have finished cleaning, as part of the final fill.

 

[Agile]

I never take any notice of reviews by makers or sellers! Only users!

And of course my totally unbiased reviews of theatres and restaurants!

Tony

 

[kiteman69]

as I don't like screwfix (Aren't they part of B&Q) I had a look at toolstation.

has anyone used this

http://www.toolstation.com/shop/p37524

then followed up by

http://www.toolstation.com/shop/p38235

(My water is soft)

also how do I know my volume (I live in a 3 bed house that has 9 single radiators in it)

Thyanks once again

 

[JohnD]

it will be less than 100 litres, so one bottle will do.

your distrust is leading you away from a market leader (Sentinel) to some little-known brand.

 

[kiteman69]

it will be less than 100 litres, so one bottle will do.

your distrust is leading you away from a market leader (Sentinel) to some little-known brand.

OK.....I'll give the house a treat.... Do I also need X100?

 

[sherbert]

If its needing constant resetting then it maybe time for a new PCB

use either Sentinel or Fernox for chemicals

I prefer Sentinel ....... similiar that some prefer blondes or Brunettes

 

[Whitespirit66]

it will be less than 100 litres, so one bottle will do.

your distrust is leading you away from a market leader (Sentinel) to some little-known brand.

OK.....I'll give the house a treat.... Do I also need X100?

Does an Escort need anti-freeze? Is the Pope Catholic?

The black water is caused by internal corrosion. If you clean this out, and refill with plain water, you will get more internal corrosion.

Putting corrosion inhibitor (Eg. X100) in the system will minimise future corrosion.

 

[gavinda]

If its needing constant resetting then it maybe time for a new PCB

based on what

 

[simond]

Highly likely to need a new PCB.

Based on experience - mine and everyone else in the industry.

 

[gavinda]

my bad......

for some reason i thought we were discussing a profile

 

[kiteman69]

I remember my neighbour had his changed and all was OK after that.
Is this something I can do (competent DIYer). Or does it have to be done by a gassafe engineer?

Thanks