Final answer:
The TCEQ requires backflow prevention assemblies to be regularly tested for non-health purposes. They need to be tested annually to ensure their proper functioning.
Step-by-step explanation:
The Texas Commission on Environmental Quality (TCEQ) requires backflow prevention assemblies to be regularly tested for non-health purposes. The frequency of testing these assemblies depends on the type of installation.
For non-health installations, backflow prevention assemblies need to be tested annually. This means that the testing should be conducted once every year to ensure the assemblies are functioning properly and preventing the backward flow of water.
It is important to regularly test backflow prevention assemblies to maintain the integrity of the water supply and prevent the contamination of drinking water.