| 摘要 |
<p>An overflow system suitable for use in controlling the level of water in, for example, a bathtub (3) is described. The overflow system comprises a conduit attached to the overflow outlet (21) of the bathtub (3) and is arranged so that when the bathtub (3) is overfilled, any excessive flow rate of overflow water through the conduit (19) is detected. The excessive flow rate is detected by arranging for the outlet (25) of the conduit to have a smaller maximum flow rate than the inlet (23) of the conduit so that water backs up within the conduit during an excessive flow rate condition. The backed up water may be detected by a reed switch (31) in conjunction with a magnetic float (27) in order to actuate a solenoid valve (9) to prevent any more water from entering the bathtub (3).</p> |
