Attention: there are substances on the market that remove limescale. If you want to do internal cleaning of the pipes, you need to contact a specialized technician.
Third step. You can clean the exterior of the boiler and the pipes using a cloth moistened with vinegar, rubbing vigorously to remove stubborn stains.
Although hot water is a comfort and a pleasure, it can also cause burns. We recommend that you clean the boiler and hot water pipes very carefully.