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SB 175

Public Safety - Fuel Gas Piping Systems and Corrugated Stainless Steel Tubing - Prohibitions and Study

2025 Regular Session Introduced by Ben Brooks and 1 co-sponsor

Maryland bans corrugated stainless steel tubing in new residential fuel gas piping while requiring a safety study on CSST alternatives and risks.

Approved by the Governor - Chapter 384
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Bill Summary · SB 175

Legislative bill overview

SB 175 prohibits the use of corrugated stainless steel tubing (CSST) for fuel gas piping in new residential construction and major renovations in Maryland, while requiring a comprehensive study on CSST safety risks and alternatives. The bill became law in May 2025 after passing both chambers with amendments.

Why is this important

CSST has been linked to potential safety hazards, including vulnerability to damage and gas leaks in certain conditions. This legislation directly affects homebuilders, plumbers, and homeowners by restricting material choices and potentially increasing construction costs, while the mandated study could inform future regulations across multiple states facing similar concerns.

Potential points of contention

  • Construction cost impacts: Replacing CSST with rigid copper or steel piping increases material and labor expenses for builders and homeowners, potentially affecting housing affordability
  • Industry opposition: Plumbing and CSST manufacturers may resist the prohibition as it eliminates market share and challenges the safety record they dispute
  • Study scope and timeline: The effectiveness of the bill depends on the study's comprehensiveness and whether its findings lead to additional restrictions or exemptions that could create regulatory uncertainty

Compiled from official sources — confirm details with the bill’s official record.

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