Buying guide · 10 min read · Updated October 2, 2026

6 Best 6 Gallon RV Water Heater in 2026: A Practical RV Guide

Best 6 gallon RV water heaters compared on anode-free tanks, ignition type and a 120V mini-tank option for small RVs and tight compartments.

By Bowen HigginsRV Editor at RV Gear Lab6 products comparedSpec-sheet researched

A 6 gallon tank is the standard heater in many compact travel trailers and camper vans, so the shortlist is mostly about gas-only versus gas and electric and about whether the tank needs an anode. A 120V point-of-use tank is included for owners who want electric hot water at one sink.

Each heater was compared on what its listing states: tank material, ignition, electric element, dimensions and warranty, with fit checked against the opening before buying.

RV Gear Lab field notes

The Rig Fit Check

Start with the job: WH-6GEA RV Gas and Electric Water Heater leads this shortlist for Low-maintenance buyers. Use that fit as a reference point, then compare the alternatives against your own space and workload.
Specs that separate the picks: The first details to compare are Aluminum tank, no anode, DSI and electric element, Direct spark ignition. Confirm the exact model and included components before ordering.
Trade-off to plan for: Aluminum differs from steel tanks

Before you buy

What Matters Before You Choose a 6 Gallon RV Water Heater

Key buying criteria so you get the right fit the first time.

01
Anode vs aluminum
Steel tanks rely on an anode that you replace, while aluminum tanks need none. It matters for yearly upkeep. Check which the listing states.
02
Gas vs gas and electric
An electric element saves propane at full hookups. It matters for cost on long stays. Check whether the element is included.
03
Ignition
Direct spark and electronic ignition remove the pilot light. It matters for reliability in wind. Look for DSI or electronic ignition.
04
Compartment fit
A 6 gallon tank is compact, but sizes vary. It matters because a wrong fit means rework. Compare stated dimensions to your opening.
05
12V and 120V needs
Gas heaters need 12V and the element needs 120V. It matters when boondocking. Check which supply each mode uses.

Our standards

Why You Can Trust RV Gear Lab

At RV Gear Lab, we compare products based on rig fit and power or hookup compatibility, verified specifications, usability, setup requirements, weight, durability, and real-world trade-offs. We do not rank products purely on marketing claims or commission rates.

We have not personally tested every product listed. Where hands-on testing is not available, recommendations are based on verified manufacturer specifications, product documentation, use-case fit, and comparative research.

How we review RV gear →

Detailed reviews

The 6 best 6 gallon rv water heater, explained

Best Anode-Free Gas and Electric · 1 of 6

WH-6GEA RV Gas and Electric Water Heater

Aluminum tank, no anode
Gas and electric
16 by 16 by 14 inches

Check price on Amazon

Best for: Low-maintenance buyers

Our take

Best for small-rig owners who want electric backup and no anode.

Why it made the shortlist

The Elk Mountain WH-6GEA is a 12 volt gas and electric 6 gallon heater with an aluminum tank that needs no anode rod. Its listing gives compact dimensions of 16 by 16 by 14 inches.

It targets longer showers and filling large containers.

What works

No anode rod to maintain
Gas and electric operation
Compact 16 by 16 by 14 inch size
12 volt ignition

Watch out for

Aluminum differs from steel tanks

Check price on Amazon

Best Gas and Electric Steel Tank · 2 of 6

Suburban SW6DE 6-Gallon RV Water Heater

DSI and electric element
Porcelain-lined steel tank
Replaceable anode rod

Check price on Amazon

Best for: Suburban replacement buyers

Our take

A great pick for owners who want gas and electric in a proven steel tank.

Why it made the shortlist

The Suburban SW6DE (5239A) is a 6 gallon heater with direct spark ignition and an electric element. It has a porcelain-lined steel tank, a replaceable anode rod and Suburban's flue tube design.

Compared with the SW6D, it adds electric heating for campsite or generator power. It sits below the Elk Mountain in price.

What works

Gas and electric in one tank
Replaceable anode rod
Direct spark ignition
Flue tube heat transfer

Watch out for

Anode needs regular checks

Check price on Amazon

Best Gas-Only Value · 3 of 6

Suburban SW6D 6-Gallon RV Water Heater

Direct spark ignition
Steel tank
Replaceable anode rod

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Best for: Gas-only buyers

Our take

Best for budget replacements that run on propane.

Why it made the shortlist

The Suburban SW6D (5238A) is a 6 gallon direct spark ignition heater with a porcelain-lined steel tank and a replaceable anode rod. It is the lowest-priced Suburban 6 gallon tank here.

It drops the electric element of the SW6DE and keeps the same flue tube design.

What works

Direct spark ignition
Replaceable anode rod
Flue tube design

Watch out for

No electric element
Gas-only operation

Check price on Amazon

Best Anode-Free Gas Only · 4 of 6

Dometic WH-6GA 6-Gallon Water Heater

Electronic ignition burner
No anode rod
LP gas only

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Best for: Low-maintenance gas buyers

Our take

Choose Dometic WH-6GA 6-Gallon Water Heater for anode rod not required.

Why it made the shortlist

It uses LP gas as its energy source.

Compared with the Elk Mountain WH-6GEA, it skips electric heating and costs less. The listing notes the door is sold separately.

What works

Anode rod not required
Electronic ignition
Lower maintenance

Watch out for

Door sold separately
No electric heating

Check price on Amazon

Best Hybrid Value · 5 of 6

KINGRVER 6 Gallon RV Tank Water Heater

12,000 BTU burner
Propane, electric or hybrid
Interior remote control

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Best for: Budget hybrid buyers

Our take

Best for owners who want an interior control at a lower price.

Why it made the shortlist

The KINGRVER 6 Gallon RV Tank Water Heater is a propane and electric hybrid with a 12,000 BTU burner and a porcelain-lined steel tank. Its listing describes remote temperature control from inside the RV and three heating modes.

It costs less than both the Elk Mountain and Suburban SW6DE while adding an interior control. Hybrid mode speeds recovery at peak use.

What works

12,000 BTU burner
Interior remote temperature control
Three heating modes

Watch out for

Less brand history
Check cutout size

Check price on Amazon

Best Electric Point-of-Use · 6 of 6

CAMPLUX Electric Hot Water Heater 6 Gallons

120V 1440W mini tank
UL approval stated
Wall or floor mount

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Best for: Electric-only buyers

Our take

A smart pick for conversions, tiny homes and booster use.

Why it made the shortlist

The CAMPLUX 6 Gallon is a 120V 1440W point-of-use mini tank with built-in insulation foam and a glass-lined tank. The listing says it has UL approval and a thermostat with three levels from 50 to 149 F.

Unlike the gas options, it plugs into a 120V outlet and mounts on a wall or floor under a sink. It costs less than half of the Elk Mountain.

What works

UL approval stated
Built-in insulation foam
Three temperature levels
Wall or floor mounting

Watch out for

Electric only
Not a drop-in for a gas heater cutout

Check price on Amazon

Methodology

How We Built This Shortlist

Each pick was assessed across 4 criteria weighted for real-world use.

6 gallon match

Only listings naming a 6 gallon tank were included.

Fuel and ignition

Gas only, gas and electric and 120V electric were separated.

Tank material

Steel with anode and aluminum without anode were compared.

Fit

Dimensions and door notes were weighed.

Decision guide

Match a 6 Gallon RV Water Heater to Your RV

By your power setup

Your situation	Recommended pick	Why
Gas, electric and no anode	Elk Mountain WH-6GEA	Aluminum tank with electric heating
Gas and electric in steel	Suburban SW6DE	DSI plus electric element
Gas only, lowest cost	Suburban SW6D	Direct spark, no electric element
Gas only, no anode	Dometic WH-6GA	Electronic ignition without anode
Electric at one sink	CAMPLUX 6 Gallon	120V UL approval stated

By Budget

Budget	Recommended pick
$210 to $440	CAMPLUX 6 Gallon or Suburban SW6D
$460 to $500	KINGRVER 6 Gallon or Suburban SW6DE
$520 to $600	Dometic WH-6GA or Elk Mountain WH-6GEA

Steel with anode vs aluminum without

Steel with anode

The Suburban SW6DE and Suburban SW6D use porcelain-lined steel with a replaceable anode.

Aluminum without anode

The Elk Mountain WH-6GEA and Dometic WH-6GA use aluminum tanks that need no anode.

Most buyers should choose an anode-free tank such as the Dometic WH-6GA.

By hot water habits

Habit	Recommended pick
Quick showers, hybrid	KINGRVER 6 Gallon
Long showers	Elk Mountain WH-6GEA
Gas only	Suburban SW6D
Booster at a sink	CAMPLUX 6 Gallon

For Camper Vans and Small Trailers Specifically

Look for

compact dimensions and low maintenance

In this comparison

The Elk Mountain WH-6GEA lists 16 by 16 by 14 inches and the Dometic WH-6GA needs no anode.

When to Spend More

Spend more if

Spend more if you want electric heating and no anode: the Elk Mountain WH-6GEA offers both.

Save if

Save if you only need gas: the Suburban SW6D and Dometic WH-6GA cost less.

FAQ

Before You Bring One Home

Will a 6 gallon heater fit my RV?

Check the stated dimensions, such as 16 by 16 by 14 inches on the Elk Mountain WH-6GEA, against your opening. Measure the door and depth before ordering.

What mistake do people make?

Buying a gas-only heater when they want electric backup. Check the model suffix and the listing.

Is the Suburban SW6DE worth it over the SW6D?

If you camp with hookups, the electric element saves propane. For gas-only use, the SW6D costs less.

How do I install a 6 gallon heater?

Shut off gas and power, drain the old tank, connect water and gas lines and test for leaks. Follow the maker's instructions.

How do I maintain it?

Check the anode on steel tanks each year and flush sediment. Winterize before freezing weather.

Bottom line

The short version

Best Anode-Free Gas and Electric
WH-6GEA RV Gas and Electric Water Heater
Check price for WH-6GEA RV Gas and Electric Water Heater (opens in a new tab)
Best Gas and Electric Steel Tank
Suburban SW6DE 6-Gallon RV Water Heater
Check price for Suburban SW6DE 6-Gallon RV Water Heater (opens in a new tab)
Best Gas-Only Value
Suburban SW6D 6-Gallon RV Water Heater
Check price for Suburban SW6D 6-Gallon RV Water Heater (opens in a new tab)
Best Anode-Free Gas Only
Dometic WH-6GA 6-Gallon Water Heater
Check price for Dometic WH-6GA 6-Gallon Water Heater (opens in a new tab)
Best Hybrid Value
KINGRVER 6 Gallon RV Tank Water Heater
Check price for KINGRVER 6 Gallon RV Tank Water Heater (opens in a new tab)
Best Electric Point-of-Use
CAMPLUX Electric Hot Water Heater 6 Gallons
Check price for CAMPLUX Electric Hot Water Heater 6 Gallons (opens in a new tab)

Browse more 6 gallon rv water heater on Amazon →

About the author

Bowen Higgins

RV Editor at RV Gear Lab

Bowen covers RV power, water systems, towing and leveling, upkeep and interior comfort, with a focus on matching gear to the rig, the hookups and the way you actually travel.

6 Best 6 Gallon RV Water Heater in 2026: A Practical RV Guide

Our top picks

The Rig Fit Check

What Matters Before You Choose a 6 Gallon RV Water Heater

Anode vs aluminum

Gas vs gas and electric

Ignition

Compartment fit

12V and 120V needs

Why You Can Trust RV Gear Lab

The 6 best 6 gallon rv water heater, explained

WH-6GEA RV Gas and Electric Water Heater

Suburban SW6DE 6-Gallon RV Water Heater

Suburban SW6D 6-Gallon RV Water Heater

Dometic WH-6GA 6-Gallon Water Heater

KINGRVER 6 Gallon RV Tank Water Heater

CAMPLUX Electric Hot Water Heater 6 Gallons

How We Built This Shortlist

6 gallon match

Fuel and ignition

Tank material

Fit

Match a 6 Gallon RV Water Heater to Your RV

By your power setup

By Budget

Steel with anode vs aluminum without

By hot water habits

For Camper Vans and Small Trailers Specifically

When to Spend More

Before You Bring One Home

Will a 6 gallon heater fit my RV?

What mistake do people make?

Is the Suburban SW6DE worth it over the SW6D?

How do I install a 6 gallon heater?

How do I maintain it?

The short version

Bowen Higgins

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