See also:

• Business: Construction and Maintenance: Materials and Supplies: Mechanical: Plumbing Fixtures and Equipment: Valves  (15)
• Business: Industrial Goods and Services: Fluid Handling  (2,744)
• Science: Environment: Water Resources: Products and Services  (138)

• 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.