75 Gal. Titanium Marathon Upper Element, 4500W

Rheem SP213790 Titanium Upper Heating Element – 240V, 4500W, Fold-Back, Low Watt Density

The Rheem SP213790 is a titanium-sheathed, fold-back style upper heating element designed for electric water heaters requiring superior corrosion resistance and reliable high-efficiency performance. This OEM-rated component delivers consistent output and extended service life, especially in systems exposed to aggressive water chemistry or high sediment levels.

With a 240V, 4500-watt low watt density rating, the SP213790 minimizes surface temperature and scale formation, improving energy transfer and extending operational life. It is approved for use in Rheem’s Marathon® and Eclipse™ series water heaters and is supplied with an EPDM gasket for a secure, leak-resistant seal.

Key Technical Specifications

• Part Number: SP213790
• Voltage: 240V
• Wattage: 4500W
• Resistance (cold): 12.5 ohms ±10%
• Sheath Material: Titanium for maximum corrosion resistance
• Configuration: Fold-back element for compact design and efficient heat transfer
• Watt Density: Low watt density (LWD)
• Mounting Thread: 1" NPSM screw-in type with included gasket

Application and Compatibility

• Designed for use in Rheem Marathon® and Eclipse™ series electric water heaters
• Ideal for installations where scale, sediment, or water quality may reduce standard element life
• OEM replacement ensures continued compliance with Rheem factory specifications

Installation Guidance

This element is engineered for direct replacement in upper positions of compatible tanks. Installation involves draining the tank, removing the old element with a 1½" socket or element wrench, and securely installing the new unit with the provided gasket. Always confirm that power is disconnected prior to service. For warranty compliance and safety assurance, installation by a licensed plumbing or HVAC professional is strongly recommended.

Performance Advantages for Contractors

• Corrosion Protection: Titanium construction significantly improves resistance to pitting and failure in aggressive water conditions
• Low Surface Temperature: LWD rating minimizes scaling and energy loss, improving tank efficiency
• Genuine OEM Quality: Manufactured to meet Rheem’s specifications for fit, finish, and performance

Professional Considerations

Contractors: The SP213790 is an excellent upgrade or replacement for demanding environments, where reliability and reduced maintenance are priorities. Keeping this part on-hand can reduce callbacks due to early element failure in hard or softened water systems.

Note: Confirm part compatibility with model and serial number data prior to ordering. Installation should comply with all applicable local plumbing and electrical codes.