Water Heaters

Question 1

What is required in some jurisdictions with natural gas water heaters?

Answer 1

Drip leg.

Question 2

What is the purpose of an expansion tank in a gas water heater system?

Answer 2

Prevents excessive pressure from building up in the pipes.

Question 3

What is the minimum height above the floor for water heaters in garages?

Answer 3

18 inches.

Question 4

Does does FVIR stand for?

Answer 4

Flammable Vapor Ignition Resistant

Question 5

What components make up a burner assembly in a gas water heater?

Answer 5

• Thermocouple
• Pilot tube
• Burner
• Pilot light
• Burner

Question 6

At what temperature or pressure does a Temperature/Pressure Relief Valve open?

Answer 6

150 PSI or 210 degrees F.

Question 7

How far should a water heater exhaust vent extend above the draft hood, and above the roof?

Answer 7

At least 5 feet above the draft hood, and at least 2 feet above the roof.

Question 8

What clearance from combustibles is required for single wall vent pipe?

Answer 8

6 inches.