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Multiple Leaking Radiators After Power Flush and Combi Boiler Install

Discussion in 'Plumbing and Central Heating' started by Sara100, 12 Jan 2016.

  1. Sara100

    Sara100

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    Hi there,

    I was having some problems with my central heating system a couple of months back. One radiator started leaking and I got this replaced and then about a month later none of the radiators were heating up. I got a few people in and they all said I needed a power flush and the system was blocked due to sludge.

    I got the power flush done and asked them to also service my Potterton Suprima boiler at the same time. When they did they found that the heat exchanger (I think that's what it was) was incredibly corroded. They said I'd need a new boiler at some point. I weighed it up and decided it was best to do this now as it was badly corroded. I decided to switch from an open vented system to a combi boiler.

    The same man was due to come back a week later to install a Valiant EcoTec Pro 24. A few days before he was due one of my radiators (a 2 column vertical Acova radiator) suddenly popped and water was gushing out. I had to get someone in to shut this off as the valve broke in the process of trying to get a bucket under the water. I got a replacement radiator and asked him to install this as he was installing the Combi. The hole that the water was coming from was about 2mm in diameter! And when I peeled back the paint there was no visible rust.

    Once the boiler man came back to install the boiler and he had finished installing the Valiant, he fired up the system and all of a sudden another radiator (4 column horizontal Acova radiator) popped and water gushed out again. He shut this off and another hole had formed about 2mm in diameter. Again when I peeled back the paint there was no visible rust. I am now going to have to replace this one.

    The boiler man came back a few days later to finish off a few things and drained the system and then when he filled it up again ANOTHER radiator popped (not an Acova, but under 10 years old). He shut this off and the hole was slightly smaller about 1 mm but again there was no rust. I will have to replace this too.

    When I asked the boiler man why this was happening he said he'd never seen this before. I also called my friend who used to be a plumber and he said he hadn't seen that happen either. They both thought that the power flush had exposed weaknesses in the radiator and the pressure from the new boiler was too much. I'm wondering whether anyone had seen this happen and whether this is the reason? Four out of six of my radiators have just gone and three of them have all sprung huge leaks in the space of two weeks since the power flush. Is there any way the power flush was done wrong? The guy I got to do the work so far was recommended and also gas safety registered. I'm obviously worried the other two will go now but if there's something wrong in the system then I'm worried it might just happen to the new radiators. I asked him whether he put an inhibitor in when he did the power flush and he said yes and I also got a magna filter fitted when he put the combi boiler in.

    Would be good to hear if anyone knows why this might have all happened and if they have any similar experiences considering the boiler man said he'd never seen this.
     
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  3. leakydave

    leakydave

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    Are your pipes all earth bonded? I have heard of electrical faults introducing electric current into a heating system and causing multiple pin-holing over a short period of time. I have never seen it myself.
     
  4. MikeCip

    MikeCip

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    Is it a fairly modern home approx. 10-15 years old. Is the pipework grey plastic?
     
  5. simond

    simond

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    The reasons your radiators are all shot is the same reason the boiler is corroded to hell.

    Your system was almost certainly pumping over, before -when it was open vent; massive corrosion has taken place.

    The powerflush hasnt damaged anything, the damage was already done.
     
  6. Dan Robinson

    Dan Robinson

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    This is why many of us have terms and conditions that state we are not liable for this kind of problem on basket case systems.


    Rare, unlucky, and a pain in the arris, but it is what it is.
     
  7. Agile

    Agile

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    I am surprised that you cannot put together the corrosion in your system and the holes in the rads. The rads rust from the INSIDE so peeling back paint you are not going to see any rust.

    Your system had a massive fault causing the corrosion. The system was power flushed to remove the corrosion products.

    We don't know what was done next but using the correct chemicals is an important part of the work.

    So what inhibitor has your installer used?

    Tony
     
  8. DIYnot Local

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