Suburban Gas-Electric Water Heater Model Number SW12DE - 5247A

Suburban Gas-Electric Water Heater Model Number SW12DE -  5247A

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

Specifications

What our Experts Think

• Flexible Dual Power: Combines LP propane and 120 V electric heating so you can enjoy hot water whether boondocking or plugged into shore power. 12‑gallon capacity covers showers, dishes, and daily RV use comfortably.

• Fast Heating & Recovery: 12,000 BTU gas burner plus a 1440 W Incoloy electric element deliver quick hot‑water recovery — electric‑only or combined gas+electric modes speed up heat‑up time.

• Direct Spark Ignition: Modern DSI system lights reliably without a pilot light, reducing start‑up issues after travel or vibration.

• Durable Tank Construction: Porcelain‑lined steel tank with a replaceable anode rod resists corrosion and extends service life under regular RV conditions.

• Proven RV Fit: Sized and shaped for RV installations — standard dimensions simplify replacement and retrofit in many 12‑gallon water heater cutouts.

• Energy‑Efficient Design: Copolymer insulation and well‑engineered heat transfer help retain heat and reduce fuel/electric draw during operation.

Q&A

Q: What is the Suburban SW12DE (5247A)?
A: A 12‑gallon gas‑electric RV water heater that provides reliable hot water for motorhomes and travel trailers.

Q: What fuel and power sources does it use?
A: It uses LP (propane) gas with a 1440 W electric element for dual‑mode heating.

Q: How much hot water can it produce?
A: 12 gallon capacity, ideal for showers, dishes, and everyday RV use.

Q: What type of ignition does it have?
A: Direct spark ignition for reliable gas lighting.

Q: Does it heat efficiently?
A: Yes — delivers 12,000 BTU output with fast recovery using gas or electric heat.

Q: Is installation easy?
A: Yes — fits standard RV water heater openings for straightforward replacement. 

Maintenance Tips

• Flush & Drain Regularly: Drain and flush the tank at least once a year to remove sediment buildup that reduces efficiency and shortens tank life.

• Inspect Anode Rod: Check the sacrificial anode rod annually; replace if heavily corroded to protect the porcelain‑lined steel tank from rust.

• Test Pressure Relief Valve: Lift the T&P valve annually to ensure it opens and reseals properly to prevent excess pressure.

• Check Venting & Exterior: Keep vents, combustion area, and exterior access panel clear of obstructions and debris.

• Inspect Lines: Periodically check gas, water, and electrical connections for leaks, corrosion, or loose fittings.

• Monitor Operation: For gas operation, ensure reliable Direct Spark Ignition; for electric, avoid running without a full tank to prevent element damage.

• Annual Professional Check: Schedule yearly service by a qualified technician for safety checks and optimal performance.