Section 12-B2902. P2902 - PROTECTION OF POTABLE WATER SUPPLY

 

Strike Section P2902.5.4 of the International Residential Code in its entirety and insert new Section P2902.5.4 in the Residential Code in its place to read as follows:

 

P2902.5.4 Connections to automatic fire sprinkler systems.  The potable water supply to automatic fire sprinkler systems shall be protected against backflow by one of the following methods:

 

1. If the sprinkler system contains no chemical additives, by a double check backflow prevention assembly conforming to ASSE 1015, or by a double check detector fire protection backflow prevention assembly conforming to ASSE 1048.

 

2. If the sprinkler system contains chemical additives, by a reduced pressure principle fire protection backflow preventer conforming to ASSE 1013, or by a reduced pressure detector fire protection backflow prevention assembly conforming to ASSE 1047.

 

Exception:  Where systems are installed as a portion of the water distribution system in accordance with the requirements of this code and are not provided with a fire department connection, backflow protection for the water supply system shall not be required.

 

Strike Section P2902.5.4.1 of the International Residential Code in its entirety and insert new Section P2902.5.4.1 in the Residential Code in its place to read as follows:

 

P2902.5.4.1 Additives or nonpotable source.  Where systems under continuous pressure contain chemical additives or antifreeze, or where systems are connected to a nonpotable secondary water supply, the potable water supply shall be protected against backflow by a reduced pressure principle backflow prevention assembly or a reduced pressure principle fire protection backflow prevention assembly.  Where chemical additives or antifreeze are added to only a portion of an automatic fire sprinkler system, the reduced pressure principle backflow prevention assembly or the reduced pressure principle fire protection backflow prevention assembly may be located so as to isolate that portion of the system.  Where systems are not under continuous pressure, the potable water supply shall be protected against backflow by an air gap or an atmospheric vacuum breaker conforming to ASSE 1001 or CSA B64.1.1.

 

 

authority

Section 10 of the Construction Codes Approval and Amendments Act of 1986 (Act), effective March 21, 1987 (D.C. Law 6-216; D.C. Official Code § 6-1409 (2012 Repl.)) and Mayor’s Order 2009-22, dated February 25, 2009, as amended.

source

Final Rulemaking published at 61 DCR 3063 (March 28, 2014 – Part 2).

EditorNote

The District of Columbia Residential Code (2013), referred to as the “Residential Code,” consists of the 2012 edition of the International Residential Code for One- and Two-Family Dwellings, published by the International Code Council (ICC), as amended by the District of Columbia Residential Code Supplement (2013) (12 DCMR B). The International Residential Code is copyrighted by the ICC and therefore is not republished here. However, a copy of the text may be obtained at:http://publicecodes.cyberregs.com/icod/irc/2012/index.htm?bu=IC-P-2012-000002&bu2=IC-P-2012-000019.