Rheem-Ruud SP213670 Element

The Rheem-Ruud SP213670 Titanium Element is a high-performance 4500W 240V water heater element designed specifically for the rigorous demands of Marathon and Eclipse electric water heaters. This screw-in heating element features a low watt density (LWD) foldback design, which significantly reduces surface temperatures to prevent lime and sediment buildup in aggressive water conditions. Constructed from premium titanium, the SP213670 offers superior corrosion resistance compared to standard copper or stainless steel alternatives, making it the industry standard for non-metal tanks. With an insert length of 16.5 inches and a 1-1/2 inch thread size, this OEM replacement part ensures precise fitment and thermal efficiency. It is primarily utilized as a lower heating element in models such as the MSR50, MR75, MR85, and MR105. For contractors, using this genuine Rheem Protech element maintains system integrity and ensures reliable recovery rates in residential and light commercial applications.

• Extreme Corrosion Resistance: The titanium construction protects the element against pitting and scale in harsh, high-mineral water environments.
• Anti-Scaling Design: The foldback low watt density configuration spreads heat over a larger surface area to minimize mineral accumulation.
• Optimized Compatibility: Engineered as a direct fit for Rheem Marathon 240V/4500W systems, ensuring seamless 1-1/2-12 thread installation.
• Dry-Fire Protection: Integrated fusing helps prevent element burnout in the event of accidental dry-firing during tank maintenance.

Is the SP213670 compatible with metal water heater tanks?
While designed for non-metal Marathon tanks, this 1-1/2" threaded titanium element can be used in any tank requiring these specific electrical and physical dimensions to provide enhanced corrosion resistance.

Can I use this as an upper heating element?
This part is typically specified as the lower element. For the upper position in Marathon units, technicians often utilize the SP610160, though the SP213670 is physically compatible if a titanium upgrade is preferred for both ports.

What tool is required for installation?
A standard 1-7/8 inch hex-head element wrench is required to securely torque the element into the 1-1/2 inch threaded flange.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.