Sludge is the build-up of magnetite which forms as a result of corrosion in your heating system. Even a minimal build-up of sludge can cause a serious drop in boiler efficiency. If sludge is left in your system, it can lead to multiple problems. A MagnaCleanse® system flush removes even hardened debris, flushing your system of virtually all magnetite that may have built up over time if left untreated. Your local heating engineer can use the MagnaCleanse RapidFlush® which is gentler on your heating system and can improve your radiator output by up to 47%. Take the next step to improve your heating system efficiency with a MagnaCleanse flush!