Rigid Aluminum Water Heater Anode Rod

One of the most commonly found factors limiting the life of water heaters is interior corrosion. The water inside the heater tank can be very harmful to the system as the harsh minerals it contains can build up and eat away at the steel surfaces, a process which is only worsened by the high water temperatures.

With the lowest voltage during the sacrificial process, aluminum anode rods usually corrode at a slower rate than magnesium rods. Thus, aluminum anode rods are the least expensive alternative, especially for water heater that heats up hard water.




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Quality Substrate Material

Constructed of high-grade aluminum, our pencil anode rod is manufactured according to ASTM AS2239-2003 A5 standard.

Element AS2239-2003 A5
Zinc (Zn) 4~5%
Indium (In) – –
Silicon (Si) 0.25% max.
Iron (Fe) 0.25% max.
Copper (Cu) – –
Stannum (Sn) 0.005%~0.25%
Cadmium (Cd) – –
Nickel (Ni) – –
Total Impurities 0.15% max.
Aluminum (Al) Remainder

High Current Output
This extruded anode rod has high surface and length ratios in relation to cross-sectional area, this allows a greater current per weight than typical cast anodes. By supplying stronger current, our magnesium pencil anode rod can deliver effective protection to water heaters, even in higher resistivity electrolytes

Uniform Current Distribution

With a thin steel core running the entire length of the anode as a support, this aluminum anode rod provides a uniform and efficient current distribution to ensure stable performance.

Easy Replacement
The anode rod is easily replaceable and should be checked each time the water heater tank is drained. Generally, anode rods should be replaced when the corrosion has consumed approximately 75% of the rod’s mass. Our anode rod is expected to provide up to two years of corrosion protection.

Strict Quality Control
By conforming to ISO 9001:2015 standards, our aluminum anode rods are manufactured, inspected, and tested in accordance with our stringent quality control procedures to ensure peak performance.

Customized Configurations
We can easily configure various anode shapes and sizes to cater to all desired specifications.

Item No. Rod Diameter Core Diameter NPT
JA-WHR-A16 0.63″ (15.9 mm) 0.13″ (3.4 mm) 1/2 ”
JA-WHR-A19 0.75″ (19.1 mm) 0.13″ (3.4 mm) 3/4 ”
JA-WHR-A20 0.79″ (20.0 mm) 0.13″ (3.4 mm) 3/4 ”
JA-WHR-A21 0.84″ (21.3 mm) 0.13″ (3.4 mm) 3/4 ”

Main Technical Parameters






Fresh Water


Water Heater

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