Rhode Island General Laws
Chapter 23-19.3.1 - Residential Sanitary Sewer Connections
Section 23-19.3.1-3. - Mandatory installation of check valves.

§ 23-19.3.1-3. Mandatory installation of check valves.
All new residential construction that will connect to a sanitary sewer system and any residential construction where the existing sewer connection will be substantially altered shall have a check valve installed, that is automatically activated, on the main building sewer line for purposes of protecting residents from the possible backflow of, and exposure to, untreated sewage.
History of Section.P.L. 2006, ch. 580, § 1.