In which type of plumbing fixture may a magnesium rod be installed?

In which type of plumbing fixture may a magnesium rod be installed?

• A. Tankless Water Heater
• B. Storage Type Water Heater
• C. Solar Water Heater
• D. Boiler

Answer: (B)

Anode rods protect the steel tank of a water heater from corrosion by sacrificing themselves. Magnesium is a common choice because it corrodes more readily, shielding the tank from rusting over time. In a storage-type water heater, the interior is a steel tank in constant contact with water, so an anode rod sits inside to prevent that corrosion and extend the life of the unit. Tankless water heaters don’t have a storage tank, so they don’t use an anode rod. Solar systems may have storage tanks, but the typical and most straightforward example of where a magnesium rod is installed is the storage-type water heater. Boilers aren’t meant to store domestic hot water, so they don’t use this rod for that purpose.

Anode rods protect the steel tank of a water heater from corrosion by sacrificing themselves. Magnesium is a common choice because it corrodes more readily, shielding the tank from rusting over time. In a storage-type water heater, the interior is a steel tank in constant contact with water, so an anode rod sits inside to prevent that corrosion and extend the life of the unit. Tankless water heaters don’t have a storage tank, so they don’t use an anode rod. Solar systems may have storage tanks, but the typical and most straightforward example of where a magnesium rod is installed is the storage-type water heater. Boilers aren’t meant to store domestic hot water, so they don’t use this rod for that purpose.