This bill establishes regulations regarding the installation of sewage grinder pumps in new residential buildings across various jurisdictions in Washington State, including cities, code cities, counties, and water-sewer districts. It explicitly prohibits these entities from banning the installation of sewage grinder pumps under specific conditions: when the buildings are located below the grade of a public sewer line, connected to a low-pressure sewer system, situated at a distance from a public sewer line that gravity cannot effectively service, requiring vertical movement of wastewater, or located in areas where geological conditions or topography make gravity sewer systems impractical.

The bill also defines key terms related to sewage grinder pumps and low-pressure sewer systems, ensuring clarity in the implementation of these regulations. By adding new sections to chapters 35.21, 35A.21, 36.01, and 57.02 of the Revised Code of Washington (RCW), the legislation aims to facilitate the use of sewage grinder pumps in appropriate circumstances, thereby addressing the needs of new residential communities that may face challenges with traditional sewer systems.