How to adjust the ballcock valve and water level in a toilet tank

Questions covered in this video:

  1. How do I identify the ballcock valve in an older toilet system?
  2. What is the function of the float in the toilet tank?
  3. How can I adjust the water level in the toilet tank using the ballcock valve?
  4. What tool is required to adjust the ballcock valve?
  5. How do I lower the water level in the tank?
  6. How do I raise the water level in the tank?
  7. What is the ideal water level for efficient flushing?
  8. How do I know if the adjustment was successful?
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