Powerflush before boiler installation

[cazzish]

Hi all,

We're about to get ourselves a new boiler fitted (Worcester Greenstar 38CDi) and are aware that the system needs to be cleaned before the installation especially as our current boiler makes a lot of banging noises when heating hot water so its likely to be pretty dirty. The rads are generally heating up OK with only one having a cold bottom which we're going to replace before boiler installation anyway.

My question really is, I asked a local heating firm (BlueFlame in Bristol) to do a powerflush (as they advertise on their website). However they came round yesterday and ran the system for maybe 4 hours with powerflush chemicals and bigger magnetic filter than our magnaclean but no pump, just using the boiler to pump it round. I sent them an email last night asking for clarification and there response was "We use a magnetic filter system to flush through which uses the same chemicals. You get exactly the same results and it is kinder on the heating system." So now I don't know if I'm just being ripped off. Is this likely to be good enough for a new boiler warrantee. The only evidence I'll have from them is a receipt saying the system was flushed! They're charging £420 for 10 radiators (but not yet paid)

Any advice would be welcome!

Thanks

Caroline

 

[Riley]

Hello and welcome

I'm assuming the device they used was a magna cleanse or similar. These are pretty good tools to use on the system and aren't so aggressive in terms of pressure on pipe joints etc. without eyes on the system it's impossible for me to say if the system is clean enough for the new boiler install although I have had very good results using mine. If you have a receipt from the installers saying that the system is flushed to manufacturers standards then the liability will fall on them should anything go wrong warranty wise.

In short I would say no you are not being ripped off, many installers use these devices now to clean systems

 

[cazzish]

Thanks Riley,
The filter they were using looked like in the picture on their webpage. www.blueflameservice.co.uk/power-flushing-bristol not sure if it was exactly the same thing and could have been a different brand. It just annoys me that they quoted for one thing and did another without any sort of discussion or explanation!

Thanks

Caroline

 

[newcastle phill]

Have to say i disagree with above.
A powerflush has a high flow rate with low pressure.
Typically the pressure doesnt exceed 2 bar but with superior flow to a boiler pump what are tiny and not designed to clean a system - merely circulate clean heating water.

The fact a powerflush agitates the system with a reverse flow means a lot more cleaning takes place. I also add slight vibration to radiators to loosen built up deposits combined with a mag-clean.

So my opinion is that is you asked for a powerflush - you didnt recieve one.

When you think about it logically the reason it builds up and stops in radiators is because the standard pump hasnt the power to shift it.

 

[Riley]

Agreed Phill I suppose it does come down to the wording of the quote, however I know lots of guys that are getting a lot of success with the magnacleanse but I suppose if the system is filthy it's going to need more oomph however we can't see the state of the system water

 

[cazzish]

I specifically asked for a powerflush, so the response stating how much they charge should be for just that unless told otherwise IMO.

 

[Riley]

No problem if you're going down to the letter of the quote then yes you asked for a power flush. Whether it was necessary or not is an entirely different matter I think you need to discuss it with the manager of the installer

 

[Meady]

If you asked for a powerflush then no they haven't done as said. A magnaclense just catches what goes through it, you need to powerflush to clean the system of anything more stubborn.

 

[Riley]

Agreed but as we've said we don't know how stubborn the muck in the system is

 

[gassafe]

You received a magnacleanse...

It will remove circulating debris & probably better than many would have done on a boiler change. It is not a powerflush tho & I consider a charge of 420 pounds to be powerflush money!

For best results, a powerflush machine would be attached with the magnacleanse filters for best results. Although of you have an old microbore system sometimes it's best not to attach a powerflush machine as there's a higher chance of creating a leak!

 

[cazzish]

If this is the case, should I be renegotiating the price I pay as currently we haven't received an invoice or paid, what is a fair price for a magnacleanse for 10 rads (in Bristol)?

 

[tolly]

Did they shut down all the radiators and use the magnacleanse to flush one radiator at a time, or did they just connect the magnacleanse and run heating for 4 hours whilst looking busy and feeling cold spots on radiators?

 

[cazzish]

They shut down the radiators then opened each individually.

 

[Riley]

I totally understand what the other guys on here are saying. As I said in another thread a few days ago A lot of issues when dealing with contractors of any type is communication and terminology breakdown . Now I don't believe from the sound of it that the engineer has intentionally tried to rip you off but rather a miscommunication has occurred where he has not explained what a power flush is in his eyes . Heating systems do not always need a full on power flush and in some instances as people before said it is advisable not to for fear of causing damage. It sounds to me like this engineer has done quite a thorough job but has not explained himself properly in your eyes. I think you could quite legitimately go back and ask for a discount as what you asked for was not supplied however this still doesn't detract from the fact that your system might be suitably clean now for a boiler install. Which is ultimately what you are trying to achieve

 

[tolly]

That's a good start atleast, im not a massive fan of just magnacleansing though. You would have got just as good results running x800 cleaner in system for a week then draining down whilst still hot. Neither are a substitute for Powerflushing though if that's what you were quoted for, there may have been a reason they did not powerflush though, i.e microbore.