D.C. Mun. Regs. tit. 25-B, § 1407
1407.1 A water filter, screen, or other water-conditioning device installed on water lines shall be located to facilitate disassembly for periodic servicing and cleaning. A water filter element shall be of the replaceable type.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).