Backflow test equipment sales, service, and calibration.

ASSE certified school for backflow tester certification and re-certification. Offers regularly scheduled training classes and testing in Kansas City, Missouri.

Provides backflow prevention training to professionals in the plumbing, pipefitting, fire suppression, irrigation and service industries. Based in Columbia, Missouri.

Nevada company specializing in water and wastewater plant consultation, management and operations, including installing and repairing backflow prevention assemblies. Outlines backflow concerns, offers manuals for sale, and will send a monthly newsletter on request.

Backflow preventer sales and parts supplier.

Online directory of certified backflow testers and training schools in Canada.