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 D.C. Municipal Regulations (Last Updated: September 13, 2017)
 Title 12. CONSTRUCTION CODES SUPPLEMENT OF 2013
 SubTilte 12-F. PLUMBING CODE SUPPLEMENT OF 2013
 Chapter 12-F6. WATER SUPPLY AND DISTRIBUTION

  Section 12-F604. DESIGN OF BUILDING WATER DISTRIBUTION SYSTEM  

Latest version.

  • Strike Table 604.4 in the International Plumbing Code in its entirety and insert new Table 604.4 in the Plumbing Code in its place to read as follows:

     

    TABLE 604.4

    MAXIMUM FLOW RATES AND CONSUMPTION FOR

    PLUMBING FIXTURES AND FIXTURE FITTINGS

    PLUMBING FIXTURE

    OR FIXTURE FITTING

    MAXIMUM FLOW RATE

    OR QUANTITYb

    Lavatory and bar sink faucet, private

    1.5 gpm at 60psi and WaterSense labeled

    Lavatory, public (metering)

    0.25 gallon per metering cycle

    Lavatory, public

    (other than metering)

    0.5 gpm at 60 psi

    Bar sink faucet in other than dwelling units or hotel and hospital private rooms

    2.2 gpm at 60 psi

    Shower heada

    2.0 gpm at 80psi and WaterSense labeled

    Sink faucet, kitchen

    2.2 gpm at 60 psi

    Urinal, flushing or non-water

    0.5 gallon per flushing cycle and WaterSense labeled, or non-water urinals

    Water closet, public and remoted

    1.6 gallons per flushing cycle

    Water closet (tank type)c

    1.28 gallons per flushing cycle and WaterSense labeled

    Water closet, private flushometer type, or public and non-remote

    1.28 gallons per flushing cycle

     

    For SI:1 gallon per minute = 3.785 L/m,

    1 pound per square inch = 6.895 kPa

     

    a. A hand-held shower spray is a shower head

    b. Consumption tolerances shall be determined from referenced standards.

    c.  Dual Flush Toilets - The effective flush volume shall not exceed 1.28 gallons (4.8 liters).  The effective flush volume is defined as the composite, average flush volume of two reduced flushes and one full flush.  Flush volumes will be tested in accordance with ASME A112.19.2 and ASME A112.19.14.

    d.  A remote water closet is a water closet that is located not less than 30 feet (9144 mm) upstream of other drain line connections or fixtures and where less than 1.5 drainage fixture units are upstream of the drain line connection.

     

     

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

EditorNote

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.