To detect leaks and account for water use down to the system level to maximize water savings and support water management.
通过将用水计量下沉至系统层面，检测泄漏并核算水量，以最大化节水效果并支持水资源管理。
Install permanent water meters (submeters) for two or more of the following water subsystems, as applicable to the project:
为以下用水子系统中两个或以上（按项目适用）安装永久水分项计量表：
| # | Water Subsystem / 用水子系统 | Metering Detail / 计量细则 |
|---|---|---|
| 1 | Indoor plumbing fixtures and fittings / 室内管道器具及配件 | 总分表测量所有室内管道用水 |
| 2 | Domestic hot water / 生活热水 | 单独计量热水系统用水 |
| 3 | Boiler water use / 锅炉用水 | 计量锅炉补水量（年用水量超过50,000加仑/189,271升） |
| 4 | Reclaimed water / 再生水 | 计量项目使用的所有再生水 |
| 5 | Irrigation / 灌溉 | 计量灌溉用水（灌溉面积占场地景观总面积50%以上时） |
| 6 | Indoor process water / 室内工艺用水 | 计量年用水超5,000加仑(18,927升)的室内工艺用水 |
| 7 | Cooling towers / 冷却塔 | 计量冷却塔补水量 |
Install permanent leak-detection systems that have an automatic shut-off function at either the building-level main connection or at the subsystem submeter. The leak-detection system must be capable of detecting unintended flow that is higher than baseline seasonal and weekly usage. The system must notify building management or provide other appropriate alert systems for the plumbing and water subsystems metered for this credit. Demonstrate that the system has an automatic fail-safe to use if the leak-detection system is malfunctioning.
在建筑级主接口或子系统分表处安装具有自动关闭功能的永久泄漏检测系统。该系统须能检测到高于基准季节性及周用水量的意外流量。系统须通知物业管理或为计量用水子系统提供其他适当的报警系统。证明系统具有自动故障安全保护机制以在泄漏检测系统故障时使用。
For projects that earn WEc2 points for outdoor water use reduction, install a dedicated submeter for the outdoor water system.
对于在WEc2中获得室外用水减少分的项目，须为室外用水系统安装独立分项计量表。