Raritan Anode f/12 & 20-Gallon Water Heater Magnesium. These Pump Parts & Accessories by Raritan are designed for use specifically with Raritan 12 and 20-gallon water heaters. The Raritan 12 and 20-Gallon Magnesium Anode has a 16-1/8" Stainless Steel fitting and it easily replaces existing magnesium anode. Enhance your water heater's longevity and change out regularly to ensure full tank usage. This Raritan Magnesium Anode Replacement has a rust-resistant rating so effectively guard against clogging and damage. Restore your water heater's function and protect your unit today with this Raritan Magnesium Anode Replacement. Specifications for Raritan Magnesium Anode f/12 & 20-Gallon Water Heater: Manufacturer: Raritan Color: Black Features of Raritan Magnesium Anode f/12 & 20-Gallon Water Heater 16-1/8" Stainless Steel Fitting Package Contents: Raritan Magnesium Anode f/12 & 20-Gallon Water Heater Raritan 1790010: Anode f/12 & 20-Gallon Water Heater Magnesium