1　巧除热水器水垢热水器用久了 ,就会出现加热速度慢、出水量小等现象 ,这是由于热水器内结垢所致。由于热水器内部结构呈“W”型且进出水口较小 ,清除水垢十分困难。这时可用稀盐酸溶液来清除热水器内的水垢。具体方法如下 :1按 1∶ 3的比例用水把浓盐酸稀释成低浓度的盐酸溶 A clever water heater scale water heater with a long time, there will be slow heating, the phenomenon of small quantities of water, which is due to the scaling inside the water heater. As the internal structure of the water heater was “W” type and the smaller inlet and outlet, removing scale is very difficult. At this time dilute hydrochloric acid solution can be used to remove scale water heater. Specific methods are as follows: 1 by 1: 3 ratio of concentrated hydrochloric acid diluted with water to a low concentration of hydrochloric acid