Shopping from Canada? 
Go to Defender Canada!
Description
The Seaward Water Heater Sacrificial Anode 74556 is a simple, effective way to protect your water heater from corrosion caused by mineral-rich or hard water. Designed to replace the drain plug, this magnesium anode helps extend tank life by inhibiting rust and buildup in challenging water conditions. Easy to install with standard 3/4" NPT threading.
Seaward Water Heater Sacrificial Anode - 74556 Item # 882657
Description
Features:
- Threads: 3/4" NPT
- Magnesium Anode for Seaward water heaters
- In a small number of instances tap water may have sufficient concentrations of dissolved salts to cause corrosion of the heater tank
- If you live in an area known to have such water, often described as alkali, alkaline, saline, mineral, hard or electro-conductive, attach this in place of the drain plug and it will help inhibit such corrosion