how to flush a tankless water heater with vinegar

Tankless Water Heater Maintenance

Regular maintenance of your tankless water heater is crucial for its longevity and efficient operation. One important task is flushing the unit, especially if you have hard water or live in an area with poor water quality. Flushing can remove mineral deposits and enhance system performance.

Flushing Your Tankless Water Heater

Materials:

  • Screwdriver
  • Adjustable wrench
  • Needle-nose pliers
  • Washing machine hose (6 feet)
  • Voltage tester
  • Submersible pump
  • Bucket (5-gallon capacity)
  • Vinegar (4 gallons) or deliming solution

Steps:

  1. Safety First: Ensure no electrical current or gas supply flows to the water heater. Turn off the gas supply or disconnect the electrical power.
  2. Access the Unit: Open the access panel and check for voltage using the voltage tester.
  3. Isolate Water: Shut off the hot and cold water shut-off valves to stop water flow. Open the pressure relief valve to relieve pressure buildup.
  4. Connect the Hoses: Connect the washing machine hose to the hot and cold water ports on the water heater.
  5. Pump the Vinegar: Place the submersible pump in the bucket containing the vinegar. Turn on the pump and circulate the vinegar through the water heater for approximately an hour.
  6. Drain and Rinse: Empty the vinegar solution from the bucket. Shut off the cold water supply valve and open the cold water shut-off valve to rinse the lines.
  7. Inspect and Reassemble: Remove the hoses and filters for cleaning and reinstall them once clean.
  8. Restore Supply: Turn on the gas or electricity supply to the water heater. Run hot water faucets for several minutes to clear out any remaining vinegar or air pockets.

Frequency of Flushing

Flushing your tankless water heater annually helps maintain system efficiency and prevent issues. Perform this task more often if you notice a decrease in hot water output or experience any unusual noises or odors from the unit.

Remember: Seek professional assistance if you encounter difficulties during the flushing process or require comprehensive water heater maintenance. Regular tankless water heater maintenance, including vinegar flushing, is essential to maximize performance and extend its life.