Flushing a water service line

 Flushing a water service line

Most water quality issues can be resolved by flushing the service line from an outside spigot/faucet. Avoid using hot water until cold water is clear.

Flushing procedure from an outside spigot or faucet:

  • Locate an outside spigot/faucet closest to the water meter.
  • Run the water with faucet all the way open for 10-15 minutes.
  • A hose may be attached to redirect the water to avoid waste. However, make sure you allow the largest amount of water to flow. attachments should be removed from the end of the hose allowing for a higher water flow.
  • Wait 30 minutes to an hour without using any water, if possible, allowing the water in the main to settle.
  • Check water for clarity.
  • If needed, flush for another 10-15 minutes.
  • In most cases the water will clear on the first or second flushing. However, a third flushing may be required especially when the clarity improves with each flushing.
  • After water has cleared on the outside spigot, flush from the inside lines.
  • Remove aerator (screen) from faucet (optional).
  • Run the cold water for 3-5 minutes from a faucet on the lowest level of the building and one closest to the water meter if possible.
  • Move to the next faucet and repeat procedure until all the faucets have been flushed (including the tub and shower).

The water heater may need to be flushed as well, refer to the manufacturer’s manual for instructions.

In some businesses or apartment buildings, an outside spigot may not be available; in this case flush the system using an inside faucet on the lowest level.

Inside flushing procedure:

  • Use the faucet closest to the water meter if possible.
  • Remove aerator (screen) from faucet (optional).
  • Run the cold water for 3-5 minutes from a faucet on the lowest level of the building.
  • Make sure the first faucet flushed is clear before moving onto the next faucet.
  • Move to the next faucet and repeat procedure until all the faucets have been flushed (including the tub and shower).