根据用户的判断和需要，对抽水马桶进行部分冲洗或完全冲洗的设备为节水项目提供了一种额外的技术，可以减少抽水马桶的消耗。已证明，在现有安装的水封中，通过减少水量从碗中去除液体和/或组织废物是可行的。此外，作为原始设备，在低冲洗量的6升抽水马桶上安装部分冲洗量控制装置的可能性也存在，以排放轻废液和纸巾负载，通过新的节水装置可以实现更大的节水。在本次讨论中，以及在制定双冲洗标准之后，ASME/ANSI A112。 19.10，被称为双冲洗装置的选择性机制被定义为通过用户的选择性驱动提供减少的或通常的体积放电，而无需进一步参与。讨论了研究项目的实验室测试测量和双冲洗装置新闻标准的制定。

Devices that provide a partial flush or a full flush of a water closet, at the discretion and need of a user, provides an additional technique to water conservation programs that reduces water closet consumption. Removal of liquid and/or tissue wastes from the bowl with reduced water volumes in existing installed water closes has been shown to be feasible. Also, the potential exists for installation of partial flush volume control devices on low flush volume 6 liter water closets, as original equipment, to discharge light waste liquid and tissues loads that can introduce even greater water savings with new water saving fixtures. For the purposes of this discussion and following the development of a Dual Flush standard, ASME/ANSI A112.19.10, the selective mechanisms denoted as dual flush devices are defined for providing either reduced or usual volume discharges by selective actuation by the user without further involvement. Laboratory test measurements from a research program and development of the news standard for dual flush devices are discussed.