Section 28-105.4.4. Ordinary plumbing work

The following ordinary plumbing
  work may be performed without  a  permit,  provided  that  the  licensed
  plumber  performing  such  work:  (i)  provides a monthly report listing
  completed  work  and  work  in  progress  during  the  preceding  month,
  including  the  block, lot and address of each job, a description of the
  work performed or in progress at each address, and the location in  each
  building  where  the work was performed or is in progress; (ii) pays the
  fees for such work in accordance with this code; and  (iii)  submits  to
  the department a certification that the work was performed in accordance
  with this code and all applicable laws and rules. Ordinary plumbing work
  shall include:
    1.  The  removal of a domestic plumbing system not connected to a fire
  suppression system, or the removal of a portion of such system.
    2. The relocation of up to two plumbing fixtures within the same  room
  to  a  maximum  of 10 feet (3048 mm) distant from the original location,
  except in health care facilities.
    3. The installation, replacement or repair of  a  food  waste  grinder
  (food  waste  disposal)  or  back  flow preventer and the replacement or
  repair of a sump pump.
    4. The replacement of closet bends.
    5. In buildings in occupancy group  R2  occupied  by  fewer  than  six
  families or in buildings in occupancy group R3, the replacement of a gas
  water  heater  or  a  gas fired boiler with a capacity of 350,000 BTU or
  less where the existing appliance gas cock is not moved,  provided  that
  the  plumber  has  inspected  the  chimney  and  found  it to be in good
  operational condition.
    6. The repair or replacement  of  any  non-gas,  non-fire  suppression
  piping not longer than 10 feet (3048 mm) inside a building, or connected
  piping previously repaired or replaced under this provision.
    7.  The  repair  or  replacement of non-fire suppression branch piping
  after the riser shutoff valve, including the  replacement  of  fixtures,
  limited  to  two  bathrooms  and  one  kitchen  per building per monthly
  reporting period.