St. Louis Automatic Sprinkler Company, Inc.

Prevent Fires ... It Pays

Backflow Preventer Testing

St. Louis Automatic Sprinkler Co can help you meet your state or underwriter required testing and inspection requirements.  Whether you need inspections yearly, quarterly, or monthly, the service professionals at St. Louis Automatic Sprinkler are trained to inspect and test your system whenever YOU need it.

We can set up schedules for your testing and inspection needs so you can take one more thing off your mind.  Don't get caught without your required service records.  We keep accurate service records so if you lose yours feel free to contact us.  We are just a call away.

Request Backflow Testing Information

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Missouri Backflow Prevention Regulations

Testing/Inspection Requirements

The function of all backflow prevention devices must be reviewed annually. Air-gaps may be
inspected by the water supplier. A state-certified backflow prevention assembly tester must perform the specific testing procedures required to verify the proper function of reduced pressure principle assemblies and double check valve assemblies.

Common Methods of Backflow Prevention

Reduced Pressure Principle Assembly:
A reduced pressure principle assembly is the highest level of mechanical backflow protection. The reduced pressure principle assembly has a hydraulically operated relief port located between two spring loaded check valves. A drop in pressure from the supply or an increase in back pressure from the customerís facility will cause the check valves to close and the relief port to open, creating an air-gap within the assembly. If either check valve becomes fouled by debris, the relief port will also open. The drawback to using an reduced pressure principle assembly is that it will lower the pressure available to the customerís premises.

Double Check Valve Assembly:

The double check valve assembly is designed for low hazard protection only. The double check valve assembly has two spring valves that act independently to provide protection from back pressure and back siphonage. The drawback to double check valve assemblies is that both check valves are susceptible to fouling by debris in the water system, which hinders their function and allows backflow to occur.