Problem: The hot water tubes for guests in the hotel have thick scale on the pipe wall and small water output, which seriously affect customers’ bathing. The hotel has tried many ways, but there is no way to solve it. It also leads to 6 bathing rooms completely blocked, and the water output of other taps is small. Customers have complained it for many times. The situation is urgent, and it is close to the national day tourism gold, so the flow of customers will be large, If this problem is not solved in time, it will cause incalculable losses, and the hotel is ready to replace the pipeline at the same time.