D.C. Mun. Regs. tit. 25, r. 25-D710
Current through Register Vol. 71, No. 49, December 6, 2024
Rule 25-D710 - DESIGN, CONSTRUCTION, AND INSTALLATION - BACKFLOW PREVENTION, AIR GAP*710.1An air gap between the water supply inlet and the flood level rim of the plumbing fixture or equipment shall be at least twice the diameter of the water supply inlet and may not be less than twenty-five millimeters (25 mm) or one inch (1 in).
D.C. Mun. Regs. tit. 25, r. 25-D710
Final Rulemaking published at 56 DCR 7975 (October 9, 2009)Authority: Section 4902 of the Department of Health Functions Clarification Act of 2001 ("Act") (effective October 3, 2001), D.C. Law 14-28, D.C. Official Code § 7-731(a)(12) (2008 Repl.), and the Mayor's Order 2006-10 dated January 27, 2006