All manufacturers of high efficiency boilers recommend that the existing system is flushed out when you replace your old boiler. This is where we attach a jet flushing machine to your system and remove deposits and sludge through its powerful “washing” action. Once the system is clean we will put an inhibitor in the system for long term protection. This cleansing will make your system more efficient and reduce your running costs. If you do not flush your system when replacing the boiler it can in some cases invalidate the warranty.