New combi's, water quality & Guarantees

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Looking at prices for fitting a combi boiler, I notice that most quote for a chem clean. Is system water quality checked first? Nobody is mentioning this on the details of prices etc. I'm not convinced a chem clean will be adequate for the guarantee, on an older ch system unlesss the quality is properly checked first... though I know power flushing it is not requirement for guarantee validity, just to the BS Standard.
Just what is the proper procedure to ensure your guarantee will not be turned down on water quality. I note a comment on this board to treat with suspicion any fitter stating that without taking their power flush option, they will not stand by the quality of the system water quality.
Your thoughts would be appreciated.
 
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I'm not convinced a chem clean will be adequate for the guarantee, on an older ch system unlesss the quality is properly checked first... though I know power flushing it is not requirement for guarantee validity, just to the BS Standard.

What would convince you?
 
Depend very much on the system you have and current water quality as to what really needs doing.

If I was fitting, where possible I'd heat the system up as is to see all rads are evenly hot first, if they are then chances are a thorough chem/mains flush will be suffice.

On some systems power flushing will do almost nothing so often it's not the way forward.

You will be luck to find if maybe 20% of installers even do the most basic cold/hot/chem flush correctly
 
You can't expect an installer to take responsibility for water condition if you havnt paid to clean it.

I've drained seemingly drinkable water from systems and then got copious amounts of carp out on a powerflush. This debri will be taken up into suspension over time and into your magnetic filter if fitted.

These don't collect all of the muck on the first pass and so some will inevitably find its way to your boiler.

Your system may well be clean if you havnt had any circulation problems or cold spots on rads.

You may have a chemical cleanse and never have an issue...
 
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Powerflushing is often a waste of time.


Much like these long warranties.


Unless you are replacing every inch of pipes work you'll always have some muck left.

There is no way water quality can be guaranteed for more than a few months by an installer and to ask for such is a tad on the mental side.


Requirements in all instructions I have any regular dealings with are for the water to reach a standard outlined in British Standards. How it gets there is not the business of the Manufacturer - and nor is it in their ability to prove one way or the other.


You need to trust the installer doing the job, and of course let him get on with it.


If you have a sealed system already, then, one would hope that sludge and debris will be relatively low in concentration.

But all a decent installer can do it flush what he can out and test the water. If TDS and pH are within spec, and the system is piped correctly there is nothing more that can be done.

OP, no offence but you have 3 threads running for the same boiler swap. That sets off major alarm bells in the "ball-ache alert" department for installers. You might see this as a big investment, but we do this week in week out.

Sooner or later you will have to trust the person doing the job to do it.

HTH!
 
Many thanks for all the advice guys. I appreciate you all taking the time and your comments have been taken on board.
 

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