Maryland Certification Requirements
Why Backflow Testing is Mandatory in Maryland
Backflow occurs when a drop in water main pressure causes contaminated water to flow backward into your clean supply. To prevent this health risk, Maryland state law requires annual testing of all backflow prevention assemblies by certified technicians.
Annual Certification
Property owners must submit proof of certification every 12 months to the local water authority to maintain standards.
Licensed Inspectors
Only plumbers with ASSE certification are authorized to certify these critical safety devices in MD.
Backflow Testing & Certification in Annapolis, MD
Maryland plumbing codes require annual certification of backflow prevention assemblies to protect the public water supply from contamination. Our certified testers provide professional residential and commercial testing, reporting, and immediate repairs.
Official Maryland Certification
Maryland Required Annual Backflow Certification
Guardian Plumbing Services provides certified backflow testing and certification across Maryland, DC, and Northern Virginia. With 30+ years of expertise and live 24/7 call answering, we ensure your residential or commercial systems stay compliant and protected. No automated machines—just fast, professional service when you need it.