Abstract: A water-saving diffuser for which a user perceives a relatively higher flow rate than the actual flow rate includes a lower chamber portion housing a distributor disk therein, and an accelerator portion attached to the lower chamber portion, the accelerator portion having a plurality of apertures for producing a multiple-stream output from the water-saving diffuser. A central aperture of the distributor disk can be custom-tailored to produce a specific flow rate for a given water supply pressure. The water-saving diffuser may be used in a water distribution system to provide a predetermined uniform flow rate to all regions of a single- or multi-story building.

Abstract: A variable-demand flow regulator regulates water flow into a building based on variable water supply and variable demand pressures. When water demand increases downstream of the variable-demand flow regulator, the water pressure decreases on the downstream side of the piston valve and a piston of a piston valve moves in the downstream direction. This results in an increased number of access holes being exposed to water flow, thus allowing a higher flow of water when water demand increases. An adjustable bleeder valve controls the flow characteristics of the regulator by affecting the movement of the piston.

Abstract: A water-saving diffuser for which a user perceives a relatively higher flow rate than the actual flow rate includes a hollow barrel for housing an accelerator disk having a plurality of apertures, a distributor disk having a central aperture of a predetermined size, and a chamber ring interposed between the distributor disk and the accelerator disk to define a chamber region therebetween. The central aperture of the distributor disk can be custom-tailored to produce a specific flow rate for a given water supply pressure. The water-saving diffuser may be used in a water distribution system to provide a predetermined uniform flow rate to all regions of a multi-story building.