Why do backflow preventers have to be tested periodically?
In order to insure the proper operation of a backflow assembly, it must be tested and certified upon installation and at least once a year thereafter if installed to protect form a health hazard situation. The Texas Commission on Environmental Quality and local water suppliers oversee these state requirements.
In order to insure the proper operation of a backlfow assembly, it must be tested and certified upon installation and periodically thereafter as required by state code. If the hazard (substance you are protecting against) is considered a high hazard (i.e., a hazard that can cause health problems), the City requires that the device be tested annually. If the hazard is considered a low hazard (i.e., the hazard effects only the taste and odor of the water), the City requires testing every 3 years. The Texas Commission on Environmental Quality oversees the state requirements.
Mechanical backflow preventers 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 preventers have to be tested periodically to ensure that they are functioning properly. A visual check of air gaps is sufficient, but mechanical backflow preventers have to be tested with properly calibrated gauge equipment.
Mechanical backflow preventers 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 preventers have to be tested periodically to ensure that they are functioning properly. A visual check of air gaps is sufficient, but mechanical backflow preventers have to be tested with properly calibrated equipment.
