The installation of unions in both the hot and cold water supply lines is recommended for ease of removing the water heater for service or replacement.
建议在热水和冷水管线上安装管接头，以方便热水器的维修或更换。
2
As part of your comprehensive containment program, you should require the installation of a Series 7 unit as a condition for the user to receive service from the public water system.
作为综合性密封规划的一部分，用户应该需要安装系列7装置作为用户接受共用水供应系统服务的条件。
3
Boiling water equipment will ensure the provision of drinking water aboard railway passenger cars, and hence is a main piece of installation for on board passenger service.