The U.S. Department of Housing and Urban Development (HUD) sponsored the demonstration projects described in this paper to document the water saving in homes of people who installed water-conserving fixtures and devices. In the past, water engineers and planners had to rely on estimates based mostly upon laboratory tests of low-flow fixtures. These estimates span a range of 300 percent, causing confusion in the water field and a general lack of confidence in water conservation techniques. With the recently completed HUD projects as a basis, water planners can now calculate the benefits of water conservation programs with more confidence that predicted savings will be realized.