Tests performed by _____ may be required by the code official where there is insufficient evidence of code compliance.

The requirement for tests performed by an approved agency is rooted in ensuring that plumbing systems meet the necessary code compliance standards. When there is insufficient evidence of compliance, such as when plans or specifications do not fully demonstrate adherence to the codes in place, the code official can mandate testing from an approved agency. These agencies are typically accredited entities with the expertise and authority to conduct assessments and tests that confirm compliance with plumbing codes.

This procedure is essential to maintain safety, reliability, and performance standards in plumbing installations. The tests may include pressure testing, flow testing, or other evaluations that validate the quality of the materials and workmanship against applicable codes. Using an approved agency ensures that the testing is impartial and meets all regulatory requirements, hence providing a strong basis for code compliance that protects public health and safety.