可以采用多种保护措施来实现节水目标。其中包括为改造现有厕所而设计的替代冲洗和改造设备。为了确定这些设备的整体有效性和潜力，大都会聘请史蒂文斯理工学院（Stevens）评估为卫生间设计的可用市场就绪设备。本文旨在概述根据大都会平均服务区特征测试的设备的估计节约和每英亩英尺成本比较。需要指出的是，为了对这些设备进行相对经济比较，有各种必要的假设，这些假设可能适用于也可能不适用于其他服务领域。 完整报告在WATERNET中引用，注册号为0031932。

A number of conservation measures can be used to achieve water conservation goals. Among these are alternative flushing and retrofit devices designed for retrofit of existing toilets. In order to determine the overall effectiveness and potential of these Devices Metropolitan retained the Stevens Institute of Technology (Stevens) to evaluate the available market-ready Devices designed for the toilet. This paper has been prepared in order to provide an overview of the estimated savings and cost per acre-foot comparison of the Devices tested based upon Metropolitan's average service area characteristics. It should be pointed out that there are a variety of assumptions necessary to develop a relative economic comparison of these Devices that may or may not be appropriate to other service areas. The complete report is referenced in WATERNET under accession number 0031932.