Tampa Bay Water is Florida's largest wholesale water provider and supplies potable water to over two million residents in the Hillsborough-Pasco-Pinellas tri-county areas, including the cities of Tampa, St. Petersburg, and New Port Richey. The organization coordinates conservation efforts in the region, while its member governments actively implement conservation programs that quantifiably reduce future demand. The Southwest Florida Water Management District is a major funding agency, providing matching conservation funds to governments for cost-effective water conservation program implementation. According to Tampa Bay Water estimates, ultra low flush (ULF) toilets installed in new homes in the Tampa Bay region are estimated to reduce regional water demand by over 15 million gallons per day (mgd) cumulatively by 2010. Rebate projects implemented by Tampa Bay Water Member Governments (Members) will save up to 6.5 mgd through retrofitting existing homes with low flow toilets by 2005. Approximately $15 million has been spent through 2002 by Tampa Bay Water member governments and the Southwest Florida Water Management District (District) on these ULV toilet rebate retrofit programs. The flapper is the main component in these new and rebated fixtures which will require replacement during the life of the fixture. Therefore, selection and installation of the appropriate replacement flapper is critical to preserving the fixture's conservation capabilities. In order to secure these savings, Tampa Bay Water conducted research identifying locally marketed and sold toilet makes and models. Toilet make and models were paired with manufacturer's recommended replacement toilet flappers that fit the specific makes and models of ULV toilets. Additionally, Tampa Bay Water received matching funds from the District to develop methods of encouraging the public to replace worn ULF flappers with equivalent water efficient replacement flappers. The project will help retain savings of existing rebated and installed ULV toilets by developing and providing standardized information to the industry and the public on the proper selection and installation of chemical resistant, well fitting, water conserving replacement toilet flappers. Flapper replacement implementation strategies are also being developed for use by its member governments to secure savings associated with rebated fixtures. The District will also be able to use these strategies in future toilet fixture rebate projects throughout their 16 county service area. Increased water savings will also be realized when the toilet's design and flushing capabilities are matched to the correct replacement flapper. Includes tables.