We provide technology and services to help protect our precious drinking water 

Yes.  Section 608.16.5, of the International Plumbing Code and Section P2902.5.3 of the International Residential Code (connections to lawn irrigation systems), states that the potable water supply to lawn irrigation systems shall be protected against backflow by a pressure-type vacuum breaker, a double-check valve assembly or a reduced pressure principle backflow preventer – depending on the degree of the site hazard. 

Fees can differ depending on the testing company, quantity of backflow prevention assemblies to be tested, number of locations, etc.  In general, expect between $50-$200 per assembly.

Mechanical backflow prevention assemblies have internal seals, springs, and moving parts that are subject to fouling, wear or fatigue.  Also, mechanical backflow preventers and air gaps can be bypassed.  Therefore, all backflow prevention assemblies have to be tested periodically to ensure that they are functioning correctly.  Mechanical backflow prevention assemblies have to be tested with properly calibrated gauge equipment.    

Only ASSE-Licensed testers are authorized to test backflow prevention assemblies.  

Each state has different requirements.  You should review your state's plumbing code to determine what is in or out of scope.

For instance, the State of MN requires all High Hazard devices (RPZ) to be tested annually, regardless of the date of install. Regarding all other testable devices (PVB, SVB, and double check), these devices need to be tested annually if they were installed after January 23rd, 2016. Water municipalities do have the choice to go above and beyond the State’s requirement to test all testable devices regardless of the date they were installed.


No, the installation, repair, replacement and/or testing of in-scope testable backflow assemblies must be performed by an ASSE licensed contractor.  Other un-related plumbing tasks can be performed by a homeowner, but not activities relating to backflow prevention devices.

Review the 2015 Minnesota Plumbing Code Fact Sheet HERE!