| 摘要 |
<p>A rain water vessel (1) includes a water inlet (21), a main tank (26), a dump tank (27) inside the main tank, and a diverter valve (31, 32). The diverter valve (31, 32) is, after a period without rainfall of less than 1 hour, normally in a first condition in which it directs rain water entering the inlet (21) into the dump tank (27). A float (33) is operated when the dump tank is filled with water to a predetermined amount, to cause the diverter valve to be put in a second condition in which it causes the rain water to flow to the main tank (26). A drain (34, 36) lowers the amount of water in the dump tank over a period of time in excess of 1 minute by outflow to exterior of the vessel (1).</p> |
