Main Line Flushing
SJWTX is responsible for delivering safe potable water to our customers that meet or exceeds drinking water standards.
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. SJWTX 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 SJWTX 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
SJWTX 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, SJWTX will offer the 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
SJWTX 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, SJWTX 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 SJWTX to have lines flushed.