16 Del. Admin. Code § 4455-1.0
The Delaware Division of Public Health shall hereby adopt the 2021 International Plumbing Code with following amendments. The code shall be known as the "2021 State of Delaware Plumbing Code". Every political subdivision within the State, including county, city, or municipal governments, shall enforce the International Plumbing Code (IPC) as adopted or modified by the Division of Public Health. Local jurisdictions may have additional water, wastewater and administrative requirements that are not part of this code. The 2021 IPC is available at ICCSAFE.ORG. The Delaware amendments are available at: http://regulations.delaware.gov/AdminCode/title16/Department%20of%20Health%20and%20Social%20Services/Division%20of%20Public%20Health/Health%20Systems%20Protection%20(HSP)/4455.shtml
Plumbing program information and documents are available at:
http://www.dhss.delaware.gov/dhss/dph/hsp/plumbing.html
16 Del. Admin. Code § 4455-1.0