A method of treating an inflammation in a subject in need thereof is disclosed. At least one central duct is formed between at least two connectors forming an inlet and an outlet respectively. The method analyzes the signal to determine the component signals. Each component may operate autonomously. Once hydrostatic testing is complete, the center portion is detached from the end wall of the test cap and removed to allow access to the building drain. The difference between the solubilities of the water-soluble coloring material in the water-soluble organic solvent A and in the water-soluble organic solvent B is 10% or more.