Cotisda RV Water Heater Element Kit for Suburban SW-Series — 120V 1440W Element, 9.25" Magnesium Anode & Wrench

Cotisda's 520900 RV Water Heater Element Kit replaces the heating element, adds a magnesium sacrificial anode, and includes a heavy-duty wrench to service Suburban SW-series water heaters in one convenient package.

This all-in-one maintenance kit bundles the primary parts technicians and RV owners typically change during routine water-heater upkeep. It combines a 120V 1440W replacement heating element with gasket, a 9.25" magnesium anode rod for corrosion protection, and a 1-1/2" crossbar element wrench made for tight compartments. The kit is designed for direct fitment with Suburban SW-series models and replaces several common OEM part numbers, making it a fast way to restore performance and reduce the chance of tank damage.

Will this kit fit my Suburban SW water heater?

Yes — the kit is built to match the Suburban SW-series form factor and thread patterns used on many popular models. It replaces specific OEM items and supports a range of SW variants for straightforward swaps.

• Compatible with Suburban models such as SW6DE, SW6DEL, SW10DE, SW12DE, SW16DE.
• Direct replacement for element part numbers 520900, 520789, 232794.
• Anode rod replaces 233514 and 232767 OEM parts.
• Standard 1-1/2" hex wrench fits element access in cramped RV heater compartments.

How does the magnesium anode protect the tank?

The included 9.25" anode rod is made from magnesium, a sacrificial metal that corrodes in place of the steel tank, slowing rust and prolonging tank life. Magnesium is often preferred for freshwater systems because it actively combats corrosive elements that cause pitting.

• Sacrificial protection reduces steel tank corrosion over time.
• Magnesium offers stronger anodic protection than aluminum in many RV water conditions.
• 9.25" length fits the design depth of Suburban SW-series tanks.
• Routine inspection/replacement recommended annually for best protection.

What features does the heating element offer for reliability?

The 120V 1440W element uses a corrosion-resistant alloy sheath and quality NPT threads to minimize leaks and resist mineral buildup. Its wattage balances efficient recovery with typical RV electrical limits for steady hot water performance.

• 1440 watts at 120V for dependable hot-water recovery in RV systems.
• Alloy sheath resists scale and reduces likelihood of premature failure.
• Includes rubber gasket to help form a tight, leak-resistant seal.
• Thread and flange match Suburban factory dimensions for direct swap-outs.

Why does the kit include a specialized element wrench?

Access to the element opening in RVs is often confined and rusty fasteners are common. The 1-1/2" zinc-plated cross-bar wrench gives the leverage and corrosion resistance needed to remove seized elements safely without damaging the tank or surrounding fittings.

• Cross-bar design provides strong, controlled torque in tight spaces.
• Zinc-plated steel construction resists rust during repeated use.
• Fits standard 1-1/2" hex element heads used on Suburban SW heaters.
• Useful for both removal and installation—reduces risk of rounded corners.

Who is this for? RV owners, fleet managers, and service technicians who maintain Suburban SW-series water heaters will find this kit practical. It’s ideal for anyone performing annual heater service, addressing a failed or leaking element, or replacing an anode to prevent tank corrosion. By bundling the element, sacrificial anode, and a purpose-built wrench, the Cotisda kit reduces parts hunting and helps ensure a proper, durable installation without extra trips to the parts store.