Local Law 152 Gas Piping Inspections in NYC

What Local Law 152 Requires

What the Inspection Covers

A thorough LL152 inspection examines:

• All exposed gas piping throughout the building, from the point of entry to each appliance connection
• Conditions at meters, regulators, and manual shutoffs
• Flexible gas connectors — hoses, corrugated stainless steel tubing (CSST)
• Gas appliance connections and accessible piping behind appliances
• Evidence of physical damage, corrosion, improper materials, or code deficiencies
• Gas valve and shutoff accessibility

The LMP documents the inspection on the GPS1 (Gas Piping System Periodic Inspection Report), which must be provided to the building owner within 30 days. The building owner then has 60 days to submit the GPS2 certification to DOB, signed and sealed by the inspecting LMP.

What Happens When Deficiencies Are Found

If the inspection reveals unsafe or non-compliant conditions, the LMP issues a deficiency finding. Unsafe conditions must be reported to Con Edison or National Grid, which can trigger a gas shutoff until corrective work is completed. Less severe deficiencies must be corrected within a defined period and re-inspected before the GPS2 can be certified.

This is where Austin Plumbing's full-service model matters: we inspect, identify the deficiency, perform the corrective gas piping work, conduct the follow-up pressure testing, and certify the GPS2. You don't need to find a separate plumber to do the repairs.

Penalties for Non-Compliance

Missing an LL152 inspection deadline or failing to submit the GPS2 results in a DOB violation. Civil penalties for LL152 non-compliance are substantial — the law was designed with meaningful financial consequences to drive compliance across NYC's aging gas infrastructure.

How to Know When Your Building Is Due

LL152 inspection schedules are organized by community district on a 4-year rolling cycle. Your due date is determined by your building's address and community district assignment. DOB publishes the inspection cycle schedule — if you're unsure whether your building's GPS2 is current, we can check DOB records and advise on your current compliance status before a violation is issued.

Contact us with your building address and we'll confirm whether your GPS2 has been filed, when your next inspection window opens, and whether any corrective work from a prior inspection remains open.

CSST Gas Piping and LL152 Compliance

Corrugated Stainless Steel Tubing (CSST) is a flexible gas piping material installed in many NYC buildings during renovations in the 1990s and 2000s. It's faster to install than rigid black iron pipe and became widely used during that era. The problem is that early CSST installations often lacked the bonding and grounding requirements mandated by the NYC Plumbing Code — requirements that exist because CSST is vulnerable to lightning-induced electrical arcing that can perforate the tubing and cause gas leaks or fires.

During LL152 inspections, non-compliant CSST is one of the most common deficiency findings we see, particularly in Queens and Brooklyn buildings renovated between 1995 and 2010. If your building has CSST, a pre-inspection assessment can identify bonding and grounding gaps before the formal LL152 inspection window — avoiding a deficiency finding and a potential gas shutoff.