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How much should it cost to power flush a 7 radiator central heating system, British gas are looking at £700/£800.

The best way to find out must be to get other quotes, there are lots of companies who advertise this service around the area.
Some advertise from £180 but that seems too low to do a decent job.

Cheers Salmon, I have had a look online and the prices start at £180 and increase to silly money. Hopefully the system will refill and run giving me a bit of time to get it done, if not I will need someone today/tomorrow if anyone can recommend someone,will know within the hour.....fingers crossed

H.S.S.will hire you a power flusher for £90,if you're savvy enough to do it yourself you know you will be getting a thorough job.

Cheers Ludwigvan looked at that one, may have to get a few quotes

Give Eddies gas services a ring on 07855735125 mention my name. Ian.

The question is, does it actually need flushing? And if so, what type of flush do you want? Are there reasons why it needs a flush, ie: cold feed pipework incorrectly configured?
If you decide to go with the £180 flush, all I can say is good luck.

Cheers Ian

System is configured 100% correct, however the restriction/ blockage is on a joint where the cold feed meets the open vent. This joint is under the bath and access is limited. I have looked at the joint and the job is possible however I'm not a plumber so would leave it to a plumber to do.
As for the £180 quote this was via the internet and the first I saw to be able to compare prices against what the gas board quoted, I am not likely to use the cheapest company as I always get four or five quotes for jobs before parting with cash.
The system will need a flush as when bleeding the radiators black water is coming out also the old pump was heavily gunked up

£700/£800 is a joke. It would probably be cheaper to simply buy new rads. They are not outrageously expensive unless you have very exotic fashionable ones.

I routinely remove and replace them when decorating - easier than trying to paint/paper behind them!. It is not hard to do, and I suspect you can do a better job of cleaning the sludge out of them off the wall, outside, by using a little ingenuity.

Saves you a fortune, and you know it's done properly if you've done it yourself!

I agree the price quoted is silly and a price I will not be paying. The system is fully working again but will need a flush sooner rather than later.

Does your system have a header tank?

Pmsl advise from an expert.

Erm, what do you think?

Yes system does have a header tank in the loft.