Suburban 6-Gal Gas+Electric RV Water Heater | SW6DE | DSI | 12K BTU

Equip your RV with proven Suburban reliability: the Suburban SW6DE 6-Gallon Gas + Electric DSI Water Heater (Model SW6DE, references 5239A / 5139E). This Suburban factory unit delivers 12,000 BTU/hr propane heating PLUS a 1,440-watt electric element — giving you the flexibility to heat water via propane (boondocking), shore power electric (saving propane), or both simultaneously for the fastest possible recovery. The right choice for buyers replacing an older Suburban water heater, Dometic WH-6GEA, or specifying a new install with the proven SW Series architecture.

Dual Heat Sources — Gas, Electric, or Both

The SW6DE's gas-electric configuration gives you real flexibility in how you heat water:

• Gas only: 12,000 BTU/hr propane — recovery rate of 10.1 gallons per hour
• Electric only: 1,440 watts at 120V AC — recovery rate of 6.1 gallons per hour
• Gas AND electric simultaneously: Maximum performance — recovery rate of 16.2 gallons per hour

Real-world benefits of this flexibility:

• Boondocking: Run on propane only — no shore power needed
• Shore power campgrounds: Run on electric — save propane for cooking and refrigeration
• High-demand morning showers: Run both for the fastest possible recovery
• Long stays: Match the heating source to your campground's power situation and propane pricing

Model Name Breakdown

The "SW6DE" name encodes the water heater's specifications:

• SW — Suburban Water Heater
• 6 — 6-Gallon capacity
• D — 12V DC Direct Spark Ignition (DSI) gas heating
• E — 120V AC electric heating element

This naming convention identifies it as a 6-gallon DSI gas-electric water heater — the most popular Suburban water heater configuration for typical RVs.

Direct Replacement for Older Models

The SW6DE is the direct replacement for these earlier water heaters:

• Suburban SW6D (gas-only, no electric element)
• Suburban SW6P (older Suburban 6-gallon variant)
• Dometic WH-6GEA (the Dometic 6-gallon gas+electric water heater) — same capacity and configuration, different brand

If your existing water heater is any of these models, the SW6DE drops in as the modern Suburban replacement. Cut-out openings of prior Suburban models are compatible.

Easy Maintenance Construction

The SW6DE is built with the proven Suburban architecture that emphasizes long-term serviceability:

• Porcelain steel tank — durable, corrosion-resistant, long service life
• Foam insulation — efficient heat retention, reduces reheating cycles
• Large diameter drain — easier maintenance and winterization
• Replaceable anode rod — absorbs corrosive electrolysis action, protecting the tank for years of service
• One-piece die-formed housing — protects controls and connections while offering easy service access

The replaceable anode rod in particular is a meaningful long-term ownership advantage — periodic anode replacement is standard preventive maintenance that dramatically extends tank service life.

Indoor Wall Switch Operation

The SW6DE's gas ignition is controlled by a wall switch mounted inside your RV — convenient indoor activation without needing to step outside to the water heater compartment. Highlights:

• Existing Suburban wall switches typically work with this water heater (in most replacement scenarios)
• Compatible Suburban wall switches available — see related accessories
• Indoor convenience — activate the heater when needed without going outside
• Propane conservation by activating only on demand

⚠️ Door Sold Separately — Two Suburban 6-Gallon Door Options

The SW6DE does NOT include an exterior access door. A door is recommended but not strictly required in all installations (depending on whether the water heater compartment is otherwise enclosed). Two Suburban 6-gallon door options are available in white:

• Suburban 6261APW — Regular door style
• Suburban 6255APW — Flush Mount door style

Match the door style to your installation aesthetic and your RV's exterior trim. Doors install easily on any type RV side, and the access door frame is straightforward to install.

Physical Specifications

• Height: 12.7"
• Width: 12.7"
• Depth: 19.2"
• Dry weight (installed): 37.4 lbs
• Capacity: 6 gallons

Heating Specifications

• Gas Input: 12,000 BTU/hr
• Gas Recovery Rate: 10.1 gallons/hour
• Electric Power: 120V AC, 1,440 watts
• Electric Recovery Rate: 6.1 gallons/hour
• Combined Recovery Rate: 16.2 gallons/hour (gas + electric simultaneously)
• Ignition: 12V DC Direct Spark Ignition (DSI)

Cross-Reference Numbers

This same Suburban water heater is referenced under multiple identifiers:

• SW6DE (model designation)
• 5239A
• 5139E

All refer to the same water heater — either may appear depending on the supplier or catalog generation.

⚠️ Professional Installation Required

RV water heater installation involves working with the RV's propane gas system, 12V DC electrical, 120V AC shore power wiring, water plumbing connections, and structural mounting. Improperly installed propane appliances are a fire and explosion risk. Improperly wired 120V electric heating elements are a shock and fire risk. Installation should be performed by a qualified RV service technician with experience working on Suburban water heaters. Always perform proper leak testing on gas connections after installation, and verify proper electrical grounding for the electric element.

2-Year Suburban Manufacturer Warranty

The SW6DE is backed by Suburban's 2-year manufacturer warranty — meaningful protection for one of the most critical components of comfortable RV travel.

Genuine Suburban OEM

As a Suburban factory unit, the SW6DE is built to current OEM specifications for RV water heater installations.

Key Features

• Genuine Suburban SW6DE 6-gallon gas + electric RV water heater
• 12,000 BTU/hr gas heating via Direct Spark Ignition (DSI)
• 1,440-watt electric heating element for shore-power operation
• Combined gas + electric recovery: 16.2 gallons/hour
• 6-gallon capacity
• Porcelain steel tank with replaceable anode rod for extended service life
• Foam insulation for efficient heat retention
• Large diameter drain for easy maintenance and winterization
• One-piece die-formed housing — protects controls, easy service access
• Replaces: Suburban SW6D, SW6P, Dometic WH-6GEA
• Fits prior Suburban cut-out openings for straightforward replacement installs
• Door NOT included — compatible with Suburban 6261APW Regular or 6255APW Flush Mount (sold separately)
• Cross-references: 5239A, 5139E
• Dimensions: 12.7" × 12.7" × 19.2"
• Dry weight: 37.4 lbs
• Backed by Suburban's 2-year manufacturer warranty

What's Included

• (1) Suburban SW6DE 6-gallon gas+electric water heater

NOT Included (sold separately):

• Exterior access door (Suburban 6261APW Regular or 6255APW Flush Mount)
• Wall switch (existing Suburban switch typically reusable; Suburban DE/DEL wall switches available)

Specifications

• Brand: Suburban
• Model: SW6DE
• Cross-Reference Numbers: 5239A, 5139E
• Type: 6-Gallon Gas + Electric RV Water Heater
• Capacity: 6 gallons
• Gas Input: 12,000 BTU/hr
• Gas Fuel: LP (Propane)
• Gas Ignition: 12V DC Direct Spark Ignition (DSI)
• Gas Recovery Rate: 10.1 gallons/hour
• Electric Power: 120V AC, 1,440 watts
• Electric Recovery Rate: 6.1 gallons/hour
• Combined Recovery Rate (gas + electric): 16.2 gallons/hour
• Tank Material: Porcelain steel
• Insulation: Foam
• Drain: Large diameter
• Anode Rod: Replaceable
• Housing: One-piece die-formed
• Wall Switch Control: Yes (switch sold separately or existing typically reusable)
• Replaces: Suburban SW6D, SW6P; Dometic WH-6GEA
• Cut-Out Compatibility: Fits prior Suburban water heater openings
• Compatible Doors: Suburban 6261APW (Regular) or 6255APW (Flush Mount) — sold separately
• Dimensions: 12.7" H × 12.7" W × 19.2" D
• Dry Weight: 37.4 lbs
• Warranty: 2-year Suburban manufacturer warranty