A.o. Smith 100074221 Anode Rod Holder Kit

Product Description

The A.O. SMITH 100074221 is an anode rod and holder kit designed for use in commercial and residential water heaters. The anode rod is a sacrificial component that attracts corrosive elements in the water supply, protecting the tank lining from premature deterioration. This kit includes the rod and the mounting holder needed for a complete service replacement. Licensed plumbers and water heater service technicians install this part during routine maintenance or when inspecting tank condition on applicable A.O. SMITH water heater models.

This kit is used across a broad range of A.O. SMITH water heater configurations, including direct vent, power vent, outdoor, indoor, and ASME-rated commercial models in both natural gas and liquid propane variants. It is a direct OEM replacement intended for technicians performing scheduled anode rod service intervals or responding to water quality complaints such as sulfur odor or discoloration.

Key Features

• Includes anode rod and holder for a complete replacement assembly
• OEM part number ensures fit and function on compatible A.O. SMITH water heater models
• Applies to both natural gas and liquid propane water heater configurations
• Covers residential and commercial ASME-rated units across multiple product families
• Sacrificial rod design protects tank interior from corrosion between service intervals

Compatibility

Compatible with the following A.O. SMITH water heater models: TK-540P-NEH (NG), T-H3J-DV (NG), T-H3-OS (LP), T-K3-PRO (NG), T-H2-DV (LP), T-K3 (LP), T-H2S-DV (NG), T-K3-SP (NG), T-H3S-DV (NG), T-H3J-OS (NG), T-H2-OS (LP), T-M32-ASME (NG), T-H2-OS (NG), T-H2-DV (NG), T-D2-IN (LP), T-K3-SP (LP), T-H3-DV (NG), T-H2S-OS (LP), T-M50 (NG), T-H3-OS (NG), T-H3M-OS (LP), T-H3M-DV (LP), TK-540P-PIH (LP), TK-540P-PEH (LP), T-M50-ASME (NG), T-M50-ASME (LP), T-H3M-DV (NG), T-K4-IN (LP), T-D2-OS (NG), T-D2-IN (NG), T-K3-PRO (LP), T-H3J-OS (LP), T-H3S-DV (LP), T-H3S-OS (LP), T-M32-ASME (LP), T-M32 (LP), T-K3 (NG), T-K3-OS (LP), T-M32 (NG), T-H3-DV (LP), T-K3-OS (NG), T-K4-IN (NG), T-H2S-DV (LP), T-M50 (LP), TK-540P-NIH (NG), T-K4-OS (NG), T-D2-OS (LP), T-H2S-OS (NG), T-H3M-OS (NG), T-H3S-OS (NG), T-H3J-DV (LP), T-K4-OS (LP).

Installation Notes

Anode rod replacement is a plumbing service task performed by licensed plumbers or qualified water heater technicians. Before servicing, shut off the cold water supply and disconnect power or gas to the unit according to the manufacturer's instructions and local code requirements. Use an appropriate socket wrench to remove the existing rod and torque the replacement to the specification listed in the unit's service manual. Inspect the tank port threads and flush the tank as needed before installing the new assembly.

Technical Specifications

• Part Type: Anode Rod and Holder Kit
• Fuel Type Compatibility: Natural Gas, Liquid Propane

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: 100074221