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HB 222

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

2025 Regular Session Introduced by Regina Boyce and 5 co-sponsors

Maryland law bans corrugated stainless steel tubing for new residential fuel gas piping and mandates safety study of existing installations.

Approved by the Governor - Chapter 385
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Bill Summary · HB 222

Legislative bill overview

HB 222 prohibits the use of corrugated stainless steel tubing (CSST) for fuel gas piping in new residential construction and requires a study on CSST safety in existing installations. The bill became law in Maryland on May 6, 2025, after resolving disagreements between the House and Senate through a conference committee process.

Why is this important

CSST has faced safety concerns related to lightning strike damage and potential gas leaks in residential settings. This legislation addresses public safety by restricting its use in new construction while commissioning research on risks in already-installed systems, affecting both homebuilders and homeowners with existing CSST installations.

Potential points of contention

  • Economic impact on builders: Restricting CSST in new construction may increase costs, as builders would need to switch to alternative piping materials like rigid copper or steel, potentially raising home prices
  • Scope of restrictions: The bill applies only to new residential construction, leaving existing CSST systems in place, which may frustrate safety advocates seeking broader remediation requirements
  • Study ambiguity: The commissioned study's findings and recommendations could create future regulatory pressure, potentially triggering retrofit requirements for existing homes at significant expense to homeowners

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

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