Hot Water Heaters

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Across
  1. 2. The type of element in an electric water heater
  2. 4. Made up of three parts. tee, nipple and cap
  3. 6. The device in the flue to slow clown the flue gases
  4. 10. Sacrificial rod
  5. 13. The process that causes water to circulate when heated
  6. 15. The relief valve to prevent explosion (3 words)(first word abbreviated)
  7. 16. Short piece of pipe used to align a fitting
  8. 19. Type of fittings used in gas fitting
  9. 20. Safety device to insure a pilot flame is lit
  10. 22. Used to make the final connection on a gas line
Down
  1. 1. Composed of 2 parts hydrogen and one part oxygen
  2. 3. short piece of pipe, threaded on both ends
  3. 4. Where the flue connects at the water heater (two words)
  4. 5. Where the flue goes
  5. 7. What is an anode rod made out of
  6. 8. The stop on a gas line (two words)
  7. 9. Water in excess of 110 degrees F.(two words)
  8. 11. The part of the heater that burns the gas
  9. 12. What material is used for water piping
  10. 14. A valve designed to prevent tho tank from imploding (two words)
  11. 17. The small flame that lights the burner
  12. 18. A valve to drain the tank
  13. 21. To eliminate the air in a system