Suburban Gas-Electric Water Heater Model Number SW12DEL - S6U5248A

Suburban Gas-Electric Water Heater Model Number SW12DEL - S6U5248A

The Suburban Advantage line of RV water heaters includes high recovery gas, gas/electric combination, gas/electric/motor aid and tankless, continuous models with sizes and features to match the requirements of almost any RV. Tank capacities include 4, 6, 10, 12 and 16 gallon models and tankless models provide up to 60,000 BTUH of endless hot water. Quality, efficiency, features, service, and selection - for more than 30 years, these have been the gold standard of Suburban water heaters. Take ADVANTAGE of Suburban’s expertise and reliability with longer lasting residential style tank and tankless water heaters.
Uses A Porcelain-Lined, Steel Water Heater Tank With An Anode Rod To "Absorb" The Electrolytical Action
Pressure Tested Twice During The Manufacturing Process To Ensure Its Integrity
A 1440 Watt Incoloy Electric Element Provides A Recovery Rate Of 6 Gallons Per Hour
Features An Indoor Mounted Switch Which Controls The Water Heater Ignition And Operation
For A Fast Recovery Rate Of 16.2 Gallons Per Hour, Both Gas And Electric Can Be Used Simultaneously

Specifications

What our Experts Think

• Best‑of‑Both‑Worlds Heating: Dual‑fuel design combines LP gas (12,000 BTU) and 120 V electric (1440 W) heating for flexible hot water delivery whether you’re boondocking or plugged into shore power.

• Fast Recovery: Electric only yields ~6 GPH, but using gas + electric together pushes ~16.2 GPH, meaning shorter waits for hot water during peak use.

• Durable, RV‑Ready Construction: Porcelain‑lined steel tank with a replaceable anode rod resists corrosion and extends life — a major advantage for long‑term RV or trailer use.

• Reliable Ignition: Electronic/Direct Spark Ignition (DSI) fires consistently without a standing pilot, improving safety and performance in mobile settings.

• Installation & Service‑Friendly: Standard 12‑gallon footprint fits most RV cutouts and the interior‑mounted control switch simplifies operation.

Q&A

Q: What is the Suburban SW12DEL (S6U5248A)?
A: A 12‑gallon dual‑fuel RV water heater that runs on LP gas and electric power with Direct Spark Ignition and a 12 V relay switch for reliable hot water on the road.

Q: How much hot water does it produce and how fast?
A: 12‑gallon capacity with 12,000 BTU input; gas only recovery ~10.1 gal/hr, electric ~6.1 gal/hr, and up to ~16.2 gal/hr when both are used.

Q: What are the key features?
A: Durable porcelain‑lined steel tank, replaceable anode rod for corrosion protection, 1440 W Incoloy electric element, foam insulation, and indoor 12 V relay switch for easy control.

Q: What are the overall dimensions?
A: Approx. 16‑7/32″ H × 16‑7/32″ W × 22‑1/4″ D — fits standard RV cut‑out openings.

Q: Is installation and maintenance simple?
A: Designed for RV installs; professional propane appliance installation recommended. Anode rod and drain make maintenance easier. 

Q: Who should consider this heater?
A: RV, camper, and motorhome owners who want a high‑capacity, fast‑recovery gas‑electric water heater for extended hot water supply.

Maintenance Tips

• Annual Flush & Drain: Flush and drain the tank at least once a year to remove sediment and maintain heating efficiency. Sediment buildup reduces performance and can shorten tank life.

• Inspect & Replace Anode Rod: Check the anode rod yearly; replace it when heavily corroded to protect the porcelain‑lined steel tank from rust and extend service life.

• Test Pressure Relief Valve: Lift the temperature‑pressure (T&P) relief valve annually to ensure it opens freely and reseals properly — critical for safety and pressure control.

• Clean Vents & Burner: Keep the exterior vent, combustion chamber, and burner area free of debris, dust, and insect nests for proper airflow and efficient gas combustion.

• Check Gas & Electrical Connections: Inspect fluid connections, gas lines, and electrical wiring regularly; tighten or repair any loose or damaged parts to prevent leaks or ignition issues.

• Winterize When Needed: If storing in freezing conditions, completely drain and bypass the heater or use a proper bypass kit to prevent freeze damage.

• Safety First: Always shut off LP gas and electrical power before performing maintenance; consider annual professional inspection to ensure safe operation