"This stuff has just saved me £100's. When my heating engineer found a blocked pipe in my boiler which would require the boiler to be removed from the wall, I was facing a large repair bill. I've never been a believer in "Liquid Engineering" but for £20 I thought it worth a try. Left it in the system for 5 days then drained and flushed. Boiler working fine now with stable pressure. Now installed Sentinel 100 inhibitor. Delighted!"
"I regularly use X800 for heating and chilled water systems and it does the job well. Screwfix have this on a promotional price at the moment and its a really good price. Would recommend this product highly."
"due to the problems that i was having with my CH system i thought i'd give this product a go. firstly i flushed my system through before adding this product , i then waited 7 days as instructed before flushing the system to clean. It seems to have worked as intended. The radiators are now heating up as intended. Very impressed with the product."
"I live in a very hard water area and even though I have a good solution of inhibitor, I still get reduced water temperature every couple of years. This product cleans the system and the results are almost immediate. I leave it cleaning for a week, then flush the system and add inhibitor again. 5 years ago, I was advised that I needed a new heat exchanger in the boiler at the cost of over £200!! This product is much better value."
"Bought a tub of this to try in Sisters 25 year old boiler as it was making very noticeable kittling noises. Within a few days it had quietened boiler no end. Most impressed, esp as she was considering a new boiler and £18 was a lot cheaper than well over £1,000 !!"
"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."
"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."
"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."
"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"
"Excellent quality product, works very well when power flushing or with the sentinel eliminator filter to restore boiler & heating system to efficient working order. personally I wont use any other product."