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Kansas City Backflow - ASSE certified school for backflow tester certification and re-certification. Offers regularly scheduled training classes and testing in Kansas City, Missouri.
Safe Flow - Provides backflow prevention training to professionals in the plumbing, pipefitting, fire suppression, irrigation and service industries. Based in Columbia, Missouri.
Water Specialties Company - Backflow preventer sales and parts supplier.
Watts Backflow Directory - Online directory of certified backflow testers and training schools in Canada.

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