520900 ScrewIn Heater Element — 1440W / 120V Direct replacement: 520900 heater element for Suburban SW series water heaters (fits SW4DE through SW16VE). Replaces part numbers 520789, SU520789, and 232794. Function and performance: 1440W / 120V screwin heating element restores hot water heating capacity and reduces recovery time for the water heater. Durable design: Screwin element engineered to resist corrosion and mineral buildup, minimizing failures and extending the service life of the heater. Easy maintenance: Screwin installation allows fast, fieldserviceable replacement without special tools—ideal for on‑site repairs and routine maintenance. Problems it fixes: Use to address damaged or failed elements, inability to heat, long heating times, low water temperature, abnormal water pressure, and slow water flow. Applications and use scenarios RV or camper : a failed element on the road to quickly restore hot water for showers, dishwashing, and hygiene. Hardwater locations: Install as part of preventative maintenance to reduce scalerelated failures and extend the heater's operational life in mineralrich water conditions. Seasonal or temporary installation: Fast swap during pretrip checks or campground stops to resolve slow heating or lowtemperature issues with Suburban SW4DE–SW16VE units. Compatibility note: Designed specifically to match Suburban SW series models SW4DE through SW16VE and the listed replacement part numbers. Verify model and part number compatibility before installation.