While both a power flush and chemical flush are designed to provide a deep cleanse of your central heating system, aiming to remove sludge, dirt and debris from the pipes, there are some key differences between the two.
A power flush works by flushing hot water and a combination of chemicals at very high pressure through heating systems, a chemical flush does not rely on high pressure. Instead, chemical flushes use gravity and a cleaning inhibitor to empty the system of debris and then later refill it with clean water.