Added it and can only hope it does the job. When I counted the rad total it numbers 19 including the double sided ones, of which several are different sizes, over three floors. This bottle serves 16 rads but difficult to know if it will be sufficient.
Used fernox before worked ok then tried other product twice the amount useless give me fernox every time
Quality brand, does what it says on the bottle.Recommended
Efficient cleaner, easy to decant into a towel radiator for circulation around the system. Seem to work by diluting the sludge contained in some radiators which became overall warmer.
Works as it should. Use Fernox filter, so just makes sense to use all supplied by one manufacturer.
Does the job at a decent price, great service from the staff as usual.
Needed 2 of these for a 26 radiator system. Drained down system and refilled adding the two bottles. Let run for 2 weeks and re-drained. Filthy water came out. Refilled and drained again with more brown water emerging. Refilled adding in two bottles of F1. System seems hotter and knocked boiler thermostat down by 5 degrees.
Good cleaner from a quality brand. I left it in for a week and then flushed the system and it seemed to do the job
Excellent cleaner. All sound from my 22 year old boiler gone.
Used it to nurse system over winter before refit.
Within an hour the radiators were untouchable (allowing me to lower they circulating temperature) and water a few days it was noticeable that I could hear the water rushing through the radiators.
Will use again
clear instructions - cheap
