DOB Local Law 152


Interior Gas Piping Safety Inspections

NYC Local Law 152 Overview

Requires all gas piping systems in all building – other thank R3 – to be inspected at least once every five years

  • Federal regulations have changed the definition of Jurisdictional Piping
    • As newly defined, includes piping up to the gas meter
  • NYS Public Service Commission may establish a new requirement related to the inspection of service piping
  • Inspections must be performed by:
    • Licensed Master Plumber (LMP)
    • Individual under direct and continuing supervision of a LMP
    • Individual with qualifications established by Rule

Inspection scope must include:

  • All exposed gas lines from point of entry of gas piping into a building, up to individual tenant spaces
    • Includes the gas meter
  • Inspectors should identify:
    • Atmospheric corrosion
    • POE wall penetration not sealed
    • Illegal connections
    • Non Code-compliant installations

Inspection scope must include:

  • In addition to exposed piping, the following must be tested with a portable gas detector:
    • Public spaces
    • Hallways
    • Corridors
    • Mechanical rooms
    • Boiler rooms

Inspection Due Dates

  • To be established by DOB
    • 5 Year cycle
    • 5 Boroughs
  • Further broken down by block
  • Alternative timeline for new buildings
    • 10th year after letter of completion, certification of occupancy, or completion date as determined by DOB Rule


Visually Inspect Exposed Gas Piping

  • Conditions Inspected for are
    • Abnormal Operating Conditions (AOC’s)
    • Identify Atmospheric Corrosion & Severity
  • AOC’s are potentially unsafe conditions such as a gas leak, illegal connections, and atmospheric corrosion.

Abnormal Operating Conditions Requiring Notification To The Gas Company

If conditions allow, please stand-by to ensure utility company access if requested to do so

  • ANY LEAK INDICATION Regardless of Odor!!! (fitting indication etc..)
  • Inadequate or excess gas pressure
  • Inappropriate or illegal piping connections/theft or diversion of service
  • Damaged interior piping
  • POE wall penetration not sealed
  • Insufficient pipe supports, meter and regulator supports
  • Inappropriate grounding to gas piping
  • Jurisdictional piping not installed to Utility specifications
  • Pressure regulator vent piping not installed properly or maintained
  • Moderate or Severve Atmospheric Corrosion (Especially at POE!)
  • Lack of a gassy odor (odor fade/masking)
  • Any condition downstream of the meter which has impact on public safety (improper venting of appliance, improper piping connections, etc.)

Conditions Presenting An Immediate Safety Risk - Get Out!!!

  • Gas Lead that Presents Immediate Danger
    • Blowing Gas
    • Uncontrolled leak
    • Any Odor or Gas Reading in Free Air When Entering a Building or Performing an Inspection
  • CO Detection
  • Odor of Gas in a Building
  • Fire or Explosion
  • Immediately Exit The Building, Notify Occupants/Building Owner On Your Way Out
  • Once Outside The Building, Notify 911 or the Utility Company
  • Document Your Findings, Await Assistance

Con Ed – (800) 752-6633

National Grid – (718) -643-4050

Atmospheric Corrosion

Medium Corrosion Severity Level 3 - MUST BE REPORTED

Medium Corrosion Severity Level 4 - REPORT IMMEDIATELY

DO NOT ATTEMPT to move or handle pip as it may break off or cause a leak

Abnormal Operating Condition (AOC)

Example 1



Example 2



Example 3



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