10 Gallon Suburban RV Water Heaters

Shop 10 gallon Suburban RV water heaters for motorhomes, fifth wheels, travel trailers, toy haulers, and other recreational vehicles. These larger-capacity water heaters provide more stored hot water than standard 6 gallon models, making them a practical choice for families, full-time RVers, multiple occupants, and RVs with greater daily hot-water demands.

Current Suburban 10 gallon water heaters are available in propane-only and gas-electric configurations. The active lineup includes the Suburban SW10D, SW10DE, and SW10DEL, each featuring direct-spark ignition, a porcelain-lined steel tank, and a replaceable anode rod.

Current 10 Gallon Suburban Water Heater Models

Current Suburban 10 gallon RV water heater models include:

• Suburban SW10D gas water heater

• Suburban SW10DE gas and electric water heater

• Suburban SW10DEL gas and electric water heater with a 12-volt relay

All three models use a physical 10 gallon storage tank and a 12,000 BTU propane burner. The SW10DE and SW10DEL also include a 1,440-watt electric heating element.

Suburban SW10D 10 Gallon Gas Water Heater

The Suburban SW10D is a 10 gallon propane RV water heater with direct-spark ignition. It uses a 12,000 BTU propane burner and does not include a 120-volt electric heating element.

Direct-spark ignition allows the burner to be activated electronically without manually lighting a standing pilot flame. Although propane supplies the heat, the SW10D requires 12-volt DC power for the control board, ignition electrode, gas valve, and safety system.

The SW10D is a practical choice for RV owners who primarily use propane, frequently camp without electrical hookups, or are replacing an existing Suburban gas-only water heater.

Suburban SW10D part number: 5242A.

Suburban SW10DE 10 Gallon Gas and Electric Water Heater

The Suburban SW10DE combines a 12,000 BTU propane burner with a 1,440-watt Incoloy electric heating element.

Propane operation provides hot water while boondocking, traveling, or camping without shore power. The electric element allows the water heater to use campground or generator power while conserving propane.

On the SW10DE, propane operation is controlled through an interior switch. The electric heating element is controlled by a dedicated switch located on the water-heater housing behind the exterior access door.

Propane and electric heating can be used together for faster recovery when the water heater is properly wired and the RV electrical system can support the additional load.

Suburban SW10DE part number: 5243A.

Suburban SW10DEL 10 Gallon Water Heater

The Suburban SW10DEL is a gas and electric 10 gallon RV water heater equipped with a 12-volt relay for controlling the electric heating element.

The relay allows both propane and electric operation to be controlled through a compatible interior switch panel. This eliminates the need to access the exterior water-heater compartment each time the electric element is turned on or off.

The SW10DEL should not be treated as interchangeable with the SW10DE without verifying the RV’s existing switches, 12-volt relay wiring, 120-volt circuit, and control system.

Suburban SW10DEL part number: 5244A.

SW10D vs. SW10DE vs. SW10DEL

The primary difference between current Suburban 10 gallon water heaters is how the water is heated and controlled.

The SW10D uses propane only. It is best suited for RVs without an existing 120-volt water-heater circuit or owners who primarily rely on propane.

The SW10DE adds a 1,440-watt electric heating element. Propane is controlled from inside the RV, while the electric element is normally controlled by a switch on the water-heater housing.

The SW10DEL includes the same propane burner and electric element but adds a 12-volt relay. This permits both heating modes to be operated through a compatible interior control panel.

The correct replacement should match the complete original model number and the RV’s existing wiring rather than being selected by tank capacity alone.

Gas-Only Suburban 10 Gallon Water Heaters

A gas-only Suburban water heater uses propane as its source of heat. The SW10D is the current gas-only model in the Suburban 10 gallon lineup.

A propane-only water heater may be the right choice when:

• The existing water heater is gas-only

• The RV lacks a dedicated 120-volt water-heater circuit

• The owner frequently dry camps or boondocks

• Propane operation is preferred

• Campground electrical capacity is limited

• A straightforward replacement is needed

Gas-only does not mean electricity-free. Direct-spark ignition models still require 12-volt DC power to operate their controls and safety components.

Gas and Electric Suburban 10 Gallon Water Heaters

The Suburban SW10DE and SW10DEL provide both propane and electric water heating.

Propane can be used when shore power is unavailable. The electric element can be used while connected to campground or generator power, allowing the owner to conserve propane.

Both heating methods may be operated simultaneously for faster recovery. Suburban states that many of its dual-energy water heaters can run on gas and electricity at the same time. (Suburban RV)

Gas and electric operation may be especially useful for:

• Families and multiple occupants

• Full-time RV living

• Back-to-back showers

• Frequent campground stays

• Conserving propane

• Faster recovery between hot-water uses

Suburban 10 Gallon Water Heater Recovery Rates

Current Suburban 10 gallon models use a 12,000 BTU propane burner.

Approximate recovery rates are:

• Propane only: 10.1 gallons per hour

• Electric only: 6.1 gallons per hour

• Propane and electric combined: approximately 16.2 gallons per hour

Actual recovery performance can vary based on incoming water temperature, propane pressure, electrical voltage, elevation, burner condition, mineral deposits, and installation conditions. (Suburban RV)

How Long Does a 10 Gallon Suburban Water Heater Last?

A conventional Suburban 10 gallon water heater stores approximately 10 gallons of heated water. The amount of usable water delivered at the shower or faucet may be greater because the stored hot water is mixed with cold water.

Actual shower time depends on:

• Stored-water temperature

• Incoming cold-water temperature

• Showerhead flow rate

• Desired shower temperature

• Amount of cold water mixed at the faucet

• Propane-burner recovery

• Electric-element operation

• Whether gas and electricity are used together

• Other hot-water fixtures being used

A low-flow RV showerhead and moderate outlet temperature can extend the available supply. The water heater also begins recovering while hot water is being used.

Suburban 10 Gallon Water Heater Dimensions

Current Suburban 10 gallon tank water heaters measure approximately:

• 16.22 inches high

• 16.22 inches wide

• 20.50 inches deep

The recommended rough opening is approximately:

• 16.38 inches high

• 16.38 inches wide

• 20.50 inches deep

Always measure the actual RV opening and available interior depth before ordering. Plumbing fittings, propane connections, wiring, framing, insulation, and nearby equipment may reduce usable clearance. (Suburban RV)

Suburban Porcelain-Lined Steel Tanks

Suburban Advantage water heaters use porcelain-lined steel tanks. The glass-fused porcelain lining creates a protective barrier between the stored water and the steel tank.

A replaceable sacrificial anode rod provides additional protection where steel may be exposed. This construction differs from the aluminum tanks traditionally used in many Atwood and Dometic water heaters. (Suburban RV)

Do Suburban 10 Gallon Water Heaters Need an Anode Rod?

Suburban 10 gallon tank water heaters require a sacrificial anode rod.

The anode rod is designed to corrode before the steel tank and also serves as the water heater’s drain. Suburban recommends inspecting the rod every 6 to 12 months and replacing it when more than approximately 75 percent has been consumed. (Suburban RV)

Use only an anode rod with the material, thread size, and dimensions specified for the Suburban water heater. Suburban offers both magnesium and aluminum replacement anode rods.

Do not install an aftermarket electric element through the anode-rod opening. Suburban states that unauthorized add-on heating elements can compromise safety, accelerate tank corrosion, and void the warranty. (Suburban RV)

Replacing an Older Suburban 10 Gallon Water Heater

The complete model number is the most important information when replacing an older Suburban water heater.

Older Suburban 10 gallon model numbers may include:

• SW10D

• SW10DE

• SW10DEL

• SW10DEM

• SW10DEC

• SW10DELC

• Older pilot-ignition models

• Previous electronic-ignition revisions

Some older configurations may include motor-aid connections, power cords, relays, or wiring arrangements that are not present on every current model.

Before ordering, verify:

• Complete model number

• Product or serial number

• Propane-only or gas and electric operation

• Pilot or direct-spark ignition

• Electric-element wiring

• Interior switch arrangement

• Relay requirements

• Power-cord or junction-box connection

• Motor-aid plumbing

• Sidewall opening dimensions

• Available installation depth

• Exterior-door dimensions

• Propane-line location

• Hot and cold water connections

• 12-volt DC wiring

• 120-volt AC wiring

A current SW10 model may require changes to the wiring, switches, plumbing, or controls when replacing an older version.

Replacing a Suburban Motor-Aid Water Heater

Some older Suburban 10 gallon water heaters include a motor-aid heat exchanger. This system circulates heated engine coolant through the water heater while the motorhome is running.

Motor-aid models have additional coolant connections that are not present on a standard SW10D, SW10DE, or SW10DEL.

When replacing a motor-aid water heater, determine whether the engine-coolant feature will be retained, bypassed, capped, or professionally removed. A conventional replacement does not automatically support the original motor-aid plumbing.

Can a 10 Gallon Suburban Water Heater Be Replaced with a 12 or 16 Gallon Model?

Suburban states that a 10 gallon unit may be replaced with a 12 gallon or 16 gallon model when enough additional space is available behind the existing water heater.

A 12 gallon model requires approximately 1.75 inches of additional depth. A 16 gallon model requires approximately 6.5 inches of additional depth. The sidewall opening may remain similar, but all dimensions, weight, plumbing, wiring, and structural support must still be verified. (Suburban RV)

Increasing capacity should not be attempted without confirming the RV was designed to support the larger filled weight and additional installation depth.

Replacing a 10 Gallon Tank with a Tankless Water Heater

A Suburban tankless water heater can replace select openings previously occupied by a 10 gallon Suburban tank water heater.

The Suburban Advantage tankless model is designed to replace 6, 10, 12, and 16 gallon Suburban tank installations when paired with the correct replacement panel, vent cap, controller, and installation components.

A tankless replacement may provide:

• Continuous on-demand hot water

• No conventional tank-recovery period

• Reduced stored-water weight

• Digital temperature control

• Less standby heat loss

Converting from a tank model may require modifications to the propane line, water lines, 12-volt wiring, exterior venting, control wiring, and mounting arrangement.

Does the Exterior Door Come with the Water Heater?

Suburban replacement water heaters are commonly sold without an exterior access door.

Current 10 gallon Suburban water heaters use a flush-mount door also designed for Suburban 12 gallon and 16 gallon models. Available colors include Colonial White, Polar White, and Black.

Before ordering, verify whether the following components are included:

• Exterior access door

• Door frame

• Mounting hardware

• Interior control switch

• Wiring harness

• Anode rod

• Plumbing fittings

• Propane fittings

Do not assume the original exterior door or switch will be compatible with a different water-heater model.

Suburban 10 Gallon Water Heater Maintenance

Routine maintenance helps protect the tank and maintain reliable heating performance.

Common maintenance includes:

• Inspecting the anode rod

• Draining and flushing the tank

• Removing sediment

• Inspecting the burner and flue

• Checking the ignition electrode

• Testing propane connections for leaks

• Inspecting 12-volt wiring

• Checking the electric-element circuit

• Maintaining the internal air pocket

• Winterizing before freezing temperatures

• Inspecting the pressure and temperature relief valve

The water heater should be turned off and allowed to cool before draining or servicing. Suburban states that gas appliances should be installed or serviced by a qualified service technician. (Suburban RV)

Choosing the Correct 10 Gallon Suburban Water Heater

Choose the SW10D when replacing a standard Suburban gas-only model.

Choose the SW10DE when propane and electric heating are needed and the electric element will be controlled using the switch on the water-heater housing.

Choose the SW10DEL when propane and electric operation must be controlled through a compatible interior switch panel.

Before ordering, confirm:

• Original model number

• Gas-only or gas and electric operation

• Ignition type

• Switch and relay configuration

• Sidewall opening dimensions

• Available installation depth

• Exterior-door requirements

• Water and propane connections

• 12-volt DC wiring

• 120-volt AC wiring

• Motor-aid connections, when present

• Required mounting components

Find the Correct 10 Gallon Suburban RV Water Heater

Browse 10 gallon Suburban RV water heaters for motorhomes, fifth wheels, travel trailers, toy haulers, and other recreational vehicles.

Choose from the SW10D propane water heater, SW10DE gas and electric model, and SW10DEL relay-equipped gas and electric water heater.

For the most accurate replacement match, locate the data plate behind the exterior water-heater door. Record the complete model and serial number, then compare the dimensions, heating sources, switches, wiring, plumbing, exterior door, and installation requirements before ordering.