Main Line Flushing

The Texas Commission on Environmental Quality (TCEQ) requires routine main line flushing as a method of protecting water quality. Flush Points are strategically placed in areas that regularly require additional flushing and at the end of main lines. Texas Water Co staff routinely flush the system from manual flush points, but some flush points have automatic flushing devices. Automatic flushing devices are increasingly used in new developments, though Texas Water Co is also installing them in existing developments and other areas as needed.

Benefits of Flushing

Flushing is required by regulation to ensure water moving through the mains is safe and of the best quality possible. Key benefits include:

• Enhancing success in maintaining consistent chlorine disinfectant levels
• Relieving air and sediment that can build in the main over time
• Preventing the water from becoming stagnant
• Ensuring water can flow sufficiently for fire protection

The Amount of Water Flushed

Texas Water Co recognizes that without explanation, flushing the main can look like a waste of water - especially in times of drought. In order to minimize the volume of water flushed, calculations are made to determine the rate of flow and length of time required to adequately flush the main. To minimize potential water waste, Texas Water Co will offer flush water to individuals and businesses that may have a need for it and that can transport it for non-potable uses.

Fire Hydrant Flushing

Texas Water Co staff flushes fire hydrants periodically to verify flow rates, or to clear mains of air and sediment after repairs have been made. Fire Departments also routinely flush through fire hydrants while performing routine hydrant testing and for other firefighting purposes.

Request Line Flushing

After repairs are made in the distribution system, Texas Water Co staff flush the main lines to relieve air and sediment which may have become trapped in the lines during repairs. However, there are times that additional flushing may be needed. If you experience air and or sediment in your lines, please review the Quick Reference Guide for Common Water Quality Issues before contacting us to have lines flushed.