D.C. Mun. Regs. tit. 25-A, § 2602
2602.1 Except as specified in §§ 2602.2 through 2602.4, a direct connection shall not exist between the sewage system and a drain originating from equipment in which food, portable equipment, or utensils are placed.⁹
2602.2 Subsection 2602.1 does not apply to floor drains that originate in refrigerated spaces that are constructed as an integral part of the building.
2602.3 A warewashing machine may have a direct connection between its waste outlet and a floor drain when the machine is located within one and a half meters (1.5 m) or five feet (5 ft.) of a trapped floor drain and the machine outlet is connected to the inlet side of a properly vented floor drain trap in accordance with the D.C. Plumbing Code (2008) incorporating the International Plumbing Code 2006, as amended by the D.C. Plumbing Code Supplement (Subtitle F of 12 DCMR).
2602.4 A warewashing or culinary sink may have a direct connection in accordance with the D.C. Plumbing Code (2008) incorporating the International Plumbing Code 2006, as amended by the D.C. Plumbing Code Supplement (Subtitle F of 12 DCMR).
SOURCE: Final Rulemaking published at 50 DCR 4394 (June 6, 2003); as amended by Final Rulemaking published at 59 DCR 13690 (November 30, 2012).