ATM cards spread relatively quickly. 1  Since the cards were used in public, others who did not yet hold the cards could see how convenient they were. Although some people were concerned about security, the convenience factors seemed to be a decisive factor in the âtug-of-warâ for and against adoption.
The first step is shutting off the main water valve is to locate it. In colder climates, you can usually find the main water shut-off valve in the basement or inside a closet in a front room of the house. Sometimes, builders will hide it behind a removable panel.
One such valve each fire sprinkler system is. required to have is a main drain valve assembly (A). The main drain valve assembly is normally located at the system riser. Its purpose is twofold. First, it is used as a central point to drain water from the entire system. As such, where practicable, all. system piping should be arranged to drain to the main drain valve. Its second purpose is to serve. as a tool to measure incoming water flow.