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Grey magnesium anode rod with hex head

Rheem

Rheem SP11309C Magnesium Anode

SKU CH-KWE0-41031

Magnesium anode rod protects compatible Rheem water heaters from internal corrosion

  • MaterialHAWA
  • Magnesium construction protects tank from corrosion
  • Replaces 22 manufacturer part numbers across models
  • Compatible with 20 Grainger part references
  • Linear low-density polyethylene components resist chemical wear
  • New condition ensures full sacrificial anode life

Rheem SP11309C Magnesium Anode

The Rheem SP11309C is a magnesium anode rod built for compatible water heater tanks. It serves residential and light-commercial installations that require a direct replacement for the listed manufacturer part numbers. Plumbers and facility managers use it to maintain cathodic protection inside glass-lined steel vessels.

Compatibility scope and limits

This anode fits a wide range of Rheem models identified by part numbers such as 22V30FM1, 22V40FM1, 22V50FM1, 42V40FV, 43VP40E2, 43VP50E2, 82V52, PDV40 and PDV50. It also crosses to Grainger references including 1PLV6, 3CFK5, 3WA61, 3WA71, 4FTP5, 4FTP6, 5AU69, 5AU70 and the 6FGU9 through 6FGV4 series. Tanks outside these documented part numbers will not accept this rod.

Magnesium material constraints

The rod uses a magnesium alloy that sacrifices itself to protect the tank lining, so it depletes over time and requires periodic inspection. In water supplies with very high conductivity or unusual chemistry, magnesium can be consumed more quickly or produce odor, making alternative anode materials a consideration. No sales restrictions apply in any state.

Highlights

  • Magnesium construction protects tank from corrosion
  • Replaces 22 manufacturer part numbers across models
  • Compatible with 20 Grainger part references
  • Linear low-density polyethylene components resist chemical wear
  • New condition ensures full sacrificial anode life

Specifications

BrandRHEEM
MaterialHAWA

Questions about this item

Will the SP11309C anode fit my Rheem water heater that uses part number 22V40FM1?

Yes, the SP11309C is listed as compatible with manufacturer part 22V40FM1 and 520254, so it will install directly in those models.

How can I confirm the anode is protecting the tank after installation?

After filling the tank, check that the hot water runs clear without a sulphur smell; a working magnesium rod sacrifices itself to prevent corrosion.

Does the box include a new hex head or Teflon tape for the 1-1/16 inch fitting?

The package contains only the magnesium anode rod itself; you must supply the 1-1/16 inch socket and thread sealant separately.

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