Maryland Backflow Tester Certification Courses
32-hour Certification Backflow Class Schedule ( $900 )
We do not have any open enrollment courses scheduled currently. Check out our course hosting program or we can do a private course ( minimum 10 students )
8-hour Backflow Renewal Class Schedule ( $350 )
We do not have any open enrollment courses scheduled currently. Check out our course hosting program or we can do a private course ( minimum 10 students )
DLLR, WSSC, and DC Approvals
For Maryland State, Our 32 and 8 hour courses are approved by the Department of Labor Licensing and Regulation - Plumbing Board. This approval is to my knowledge valid again.
For WSSC, we applied to be on their list and are supposed to hear back on 04/11/25. There is an instructor's list that your diploma has to be signed by which is shown here
For Washington DC, our 32-hour course and single party examination has been acceptable to DC Water for many years. You just submit your diploma with some other information directly to DC Water
Which Backflow Preventer Testing Procedures Should I Use?
We have found the USC-10th Edition testing procedures to be the most efficient. On our YouTube Channel, we created a series of videos where we test the four types of preventers using these procedures:
Testing the Reduced Pressure Principle ( RP ) - By the Book
Testing the Double Check Valve Assembly ( DCV ) - By the Book
Testing the Pressure Vacuum Breaker ( PVB ) Assembly - By the Book
Spill Resistant Vacuum Breaker ( SVB ) - Possible Failures & Diagnostics
Pressure Vacuum Breaker (PVB) Possible Failures & Diagnostics
Double Check Valve ( DCV ) Possible Failures & Diagnostics
Reduced Pressure Backflow ( RP ) Possible Failures & Diagnostics