Boiler cleaning using a hosepipe typically refers to the process of cleaning the exterior and possibly some internal components of a boiler using water pressure from a hosepipe. It’s an accessible and straightforward method, often used for removing dirt, debris, soot, and grime from the outer parts of the boiler and associated systems. However, this method is usually intended for cleaning boilers with external dirt buildup rather than deep internal cleaning, which may require professional servicing.