| 摘要 |
PURPOSE:To make it possible to spot a position of water leakage, by providing a series of check valves in selected parts in a water supply pipe line system in a building and by disposeng switches for discriminating the open and close conditions of the valves. CONSTITUTION:There are provided a series of check valves CV1 through CV6 in a water supply pipe line system. The open and close conditions of the check valves CV1 through CV6 are indicated by means of indicator lamps L1 through L6. If a point X2 in a pipe line is a position of leakage, the indicator lamp L2 alone is turned on while the indicator lamps L2, L4 are turned on if a point X3 in the pipe line is a position of leakage. Further, if a point X4 in a pipe line is a position of leakage, the indicator lamps L2, L4, L5 are turned on. |
