| 摘要 |
<p>A water saving system, in which stagnant and cold water in the hot water pipe, in case of demand of hot water, is directed by a hydraulic set (2, 4, 12, 13) to a reservoir (14) and from thence is delivered to the cold water distribution network (12). The pressure in the hot water network is equal to the pressure in the mains supply, the pressure in the cold water network is reduced by a pressure relief valve (15, 16, 17, 18), thereby avoiding the need for additional pressurising means.</p> |
