Backflow Prevention: What You Need to Know
Understanding Backflow and Its Importance
Backflow occurs when water flows in the reverse direction—from your plumbing back into the public water supply. This often happens when there is a drop in pressure in the public water system, which can be caused by various factors like water main breaks or high demand. Cross-connections are points in your plumbing where clean water is connected to non-potable sources such as irrigation systems, pools, or chemical sprayers. If backflow occurs at these connections, contaminants like chemicals and soil can contaminate the clean water supply.
To prevent this, a backflow preventer—a mechanical device installed on your water service line—stops reverse flow, ensuring clean water only moves from the public supply to your plumbing.
Why Backflow Preventers Matter
Without a properly functioning backflow preventer, not only is your own water safety at risk, but also the health of the entire community’s water supply. These devices are essential for protecting drinking water from contamination.
Types of Backflow Preventers
The type of backflow preventer required depends on the hazard level of your property. Here are some common types:
- Dual-Check Valve: Ideal for lower-hazard situations, typically used in residential settings without irrigation or chemical exposure.
- Double-Check Valve Assembly (DCVA): For moderate hazards, featuring two independent check valves to prevent backflow.
- Reduced Pressure Principle Assembly (RPZ): Used in high-hazard settings (e.g., irrigation systems with chemicals). It includes two check valves and a relief valve to ensure maximum protection against contaminants.
Local plumbing regulations in Shelby County require the proper type of backflow preventer based on the potential hazards present in your plumbing system.
Local Regulations in Shelby County
In Shelby County, specific regulations regarding backflow prevention must be adhered to:
- Approved backflow prevention assemblies are often required for residential properties with pools, irrigation systems, and all commercial/industrial customers.
- Annual testing by a state-certified tester is mandatory, and results must be submitted electronically to the City of Shelby’s designated system.
- Backflow devices should be installed close to the water meter, accessible for maintenance, and in compliance with local codes to avoid penalties.
How Johnson Plumbing Company Can Assist
Johnson Plumbing Company is your local expert on backflow prevention in Piperton, TN, and the surrounding areas. Our services include:
With Johnson Plumbing, ensure your backflow preventer meets all regulations and protects your water supply.
What You Should Do as a Property Owner
Piperton / Shelby County
Determine Whether You Need A Backflow Preventer
Irrigation systems, pools, or cross-connections may need a backflow preventer per City of Shelby ordinance.
Contact a Licensed Plumber (Like Johnson Plumbing)
We can evaluate your property and recommend the right backflow preventer.
Schedule Annual Testing
Ensure your device is tested each year to comply with regulations.
Keep Good Documentation
Maintain records of installation, testing, and maintenance for future reference.
Plan Ahead
When activating or deactivating systems like irrigation, notify the utility if required and schedule testing upon reactivation.
