Rheem-Ruud SP11309C Anode Rod Magnesium 0.7" X 44.375"

The Rheem-Ruud SP11309C Magnesium Anode Rod is an accessory that might be needed if one wants to get more years from his or her water heater. This 0. 75” rod which is made of magnesium having NPT fitting is used to protect the internal parts of your water heater tank from corroding. The material that is used in water heater tanks is steel and magnesium is even more reactive than this material. The anode rod works like a nail through which corrosive material is drawn to the said rod away from the tank.