Delaware Plumbing Legislation, Codes, and Guidelines

Plumbing Codes and Legislation in Delaware

The State of Delaware regulates plumbing through a combination of adopted model codes and state-specific administrative regulations. The primary technical standard for plumbing installations in the state is the 2021 International Plumbing Code (IPC), which has been adopted by the Delaware Division of Public Health with specific state-level amendments. These amendments are codified in the Delaware Administrative Code (Title 16, Section 4455).

Primary State Agencies and Boards

Plumbing regulation in Delaware is divided between technical code enforcement and professional licensure:

• Delaware Division of Public Health (DPH): This agency is responsible for the adoption and administration of the state plumbing code. It oversees the technical standards for plumbing installations, including permitting and inspections in many jurisdictions.
• Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners: Operating under the Delaware Division of Professional Regulation (within the Department of State), this board is responsible for the professional licensure of plumbers. It sets examination standards, establishes continuing education requirements, and handles disciplinary actions for licensed professionals.
• Department of Natural Resources and Environmental Control (DNREC): This department maintains authority over specific environmental aspects related to plumbing, such as on-lot septic systems and well water construction standards.

Resources to Learn More

• Delaware Administrative Code: 16 Del. Admin. Code § 4455 (State of Delaware Plumbing Code)
• Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners
• Delaware Code Title 16, Chapter 79: Basic Plumbing Principles
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