Strike Section 1302.3 of the International Plumbing Code in its entirety and insert new Sections 1302.3 and 1302.3.1 in the Plumbing Code in its place to read as follows:

1302.3 Makeup water. Where an uninterrupted supply is required for the intended application, potable water shall be provided as a source of makeup water for the storage tank. The potable water supply shall be protected against backflow by an approved air gap fitting in accordance with Section 608.13.1.

1302.3.1 Makeup water from other sources. In addition to the makeup water required by Section 1302.3, makeup water supplied to a gray water system from a rainwater collection system complying with Section 1115 shall be allowed where approved. The design of the makeup water connection between the two systems shall be approved prior to installation. The overflow discharge of a rainwater collection system shall not pass through any portion of the gray water system.

Strike Section 1302.4 of the International Plumbing Code in its entirety and insert new Section 1302.4 in the Plumbing Code in its place to read as follows:

1302.4 Coloring. The gray water shall be dyed purple with a food grade vegetable dye before such water is supplied to the fixtures.

Strike Section 1302.6 of the International Plumbing Code in its entirety and insert new Section 1302.6 in the Plumbing Code in its place to read as follows:

1302.6 Identification. Distribution piping and reservoirs shall be identified as containing nonpotable water. Gray water collection piping shall be identified so as to preclude drainage pipe connections from prohibited fixtures. Piping identification shall be in accordance with Section 608.8.

SOURCE: Final Rulemaking published at 61 DCR 3169 (March 28, 2014 – Part 2); as corrected by Errata Notice published at 61 DCR 5246 (May 23, 2014).

The District of Columbia Plumbing Code (2013), referred to as the “Plumbing Code,” consists of the 2012 edition of the International Plumbing Code as amended by the District of Columbia Plumbing Code Supplement (2013) (12 DCMR F). The International Plumbing Code is copyrighted by the International Code Council and therefore is not republished here. However, a copy of the text may be obtained at: http://publicecodes.cyberregs.com/icod/ipc/2012/index.htm?bu=IC-P-2012-000004&bu2=IC-P-2012-000019.