Domestic hot water water supply installation

The utility model discloses a domestic hot water water supply installation, including water heater and water outlet faucet, be connected with hot -water line and cold water pipe on the water heater, characteristics are provided with a tub inner cooling water circulation system between hot -water line, cold water pipe and the water outlet faucet, the advantage is when needs use hot water, and accessible pipe inner cooling water circulation system with the cold water process water heater circulation heating who piles up in the hot -water line, treats to confess hot water again after the temperature risees earlier, has avoided piling up the water waste who leads to the fact because of the water heater is hysteretic with fuel factor and hot -water line inner cooling water, in addition, can install the direct mount in current household water heater supply channel with this, its suitability is better, and is with low costs. 本实用新型公开了种家用热水供水装置，包括热水器和出水龙头，热水器上连接有热水管和冷水管，特点是热水管、冷水管和出水龙头之间设置有管内冷水循环系统；优点是当需要使用热水时，可通过管内冷水