Rated 1 out of 5Â by Kcom Didn't really do the job.
Cut a long story short, my heating system needs a power flush.
2 weeks before fitting a new condensing boiler I filled the CH system with X800, the CH system worked well with a very old Potterton boiler.
Gas safe plumber fitted a German condensing boiler and it would not fire and when it did would stay on for about 30 secs. Even changed the flow switch but still no joy. On the advice of a plumber mate he suggested changing over the very old Grundfos pump, still no joy but did find that there was quite a bit of sludge in the pipes after X800 treatment.
In the end called out the company engineer and after some checks said that the system is suffering from poor circulation, that new boilers are quite sensitive and that a power flush should be carried out to sort out poor circulation issue.
Very much regretting taking old the old boiler, might have been inefficient but did work.
19 Nov 2014
Rated 5 out of 5Â by HarryO59 Excellent product
Faced with having to renew almost blocked pipes on an oldish and awkward system, this product worked its magic very quickly, thoroughly cleaning out the sludge from the pipes. Before that some of the radiators had stopped working. Would recommend fitting a magnetic filter as well.
11 Nov 2014
Rated 5 out of 5Â by DIYDave999 Cleans where others fail...
X800 has been cleaning whether others have failed. Reliably removing sludge flake from the heat exchanger when added to the system despite power flushing two years ago. Have drained the system and tried other products since but this one is the best. Works when hot or cold, and bubbles away so you'll need to bleed the highest radiator fairly frequently, but well worth it. It even protects the system from rust whilst its in there so you can leave it in for longer.
10 Nov 2014
Rated 5 out of 5Â by Frazb Worth double the price
Was told by scottish power boiler care my plate heat exchanger was choked and I'd need a power flush as I was having issues with my hot water on a back boiler. Wasn't entirely convinced so decided to try this. Put a bottle into my system and ran it for an hour, let cool for 30mins, ran for an hour and did this three times. Flushed the system through for about 90 mins afterwards. Re filled and added the sentinel inhibitor hey presto boiler working again with scalding hot water and I'd say it's even a bit quieter now
19 Oct 2014