Buying Guide
2 Best Tankless Replacement For 6 Gallon RV Water Heater in 2026: A Practical RV Guide
Two 6 gallon propane and electric tank heaters compared as a stand-in for a tankless swap, with an honest note that neither is tankless.
By Hardcastle's RV Editors
10 min read2 products evaluated
Owners searching for a tankless replacement for a 6 gallon heater usually want hot water without a small tank running out. The two products available for this search are 6 gallon tank heaters, not tankless units, so the real comparison is tank versus tank.
Both picks are propane and electric hybrids that fit most 4 to 6 gallon cutouts. If you want a true tankless heater, look at the tankless guides on this site, and check cutout, door and 12 volt supply before you commit.
Hardcastle’s RV field notes
The Rig Fit Check
A quick way to connect the shortlist to the space, workload and ownership details that matter after the box arrives.
- Start with the job
- CAMPLUX 6 Gallon RV Water Heater leads this shortlist for Interior-control drop-ins. 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 6 gallon propane and electric, 6 gallon hybrid. Confirm the exact model and included components before ordering.
- Trade-off to plan for
- Not a tankless heater
The Practical Shortlist
A road-tested-thinking look at 2 options, organized around the job each one suits best.
Best Overall
CAMPLUX 6 Gallon RV Water Heater
Interior-control drop-ins
Our take Check price for CAMPLUX 6 Gallon RV Water Heater (opens in a new tab)
Best with Remote
KINGRVER 6 Gallon RV Tank Water Heater
Remote-control drop-ins
Our take Check price for KINGRVER 6 Gallon RV Tank Water Heater (opens in a new tab)
| Pick | Best for | Key spec | Price |
|---|---|---|---|
| Interior-control drop-ins | 6 gallon propane and electric | Check price for CAMPLUX 6 Gallon RV Water Heater (opens in a new tab) |
| Remote-control drop-ins | 6 gallon hybrid | Check price for KINGRVER 6 Gallon RV Tank Water Heater (opens in a new tab) |
Why Each Pick Made the Cut
Best Overall1 of 2
CAMPLUX 6 Gallon RV Water Heater on Amazon (opens in a new tab)
Choose CAMPLUX 6 Gallon RV Water Heater for interior panel for modes and temperature.
Best for
- Interior-control drop-ins
Why it made the shortlist
CAMPLUX 6 Gallon Black is a propane and electric hybrid and a direct replacement for most Suburban and Dometic 4 to 6 gallon models. The listing says three heating modes and one-click temperature are set from an interior panel.
Against KINGRVER 6, it uses an interior panel instead of a remote. Against a true tankless heater, it stores hot water.
It is the best match for owners who want a drop-in 6 gallon hybrid with interior control. It earns its slot for interior-control drop-ins.
Key dimensions & specs
- 6 gallon propane and electric
- Interior control panel
- Three modes
Pros
- Interior panel for modes and temperature
- Porcelain-lined tank with anode
- Drop-in for 4 to 6 gallon units
- Propane for dry camping
Cons
- Not a tankless heater
- Check venting and cutout fit
Best with Remote2 of 2
KINGRVER 6 Gallon RV Tank Water Heater on Amazon (opens in a new tab)
KINGRVER 6 Gallon RV Tank Water Heater makes the shortlist because remote controller included.
Best for
- Remote-control drop-ins
Why it made the shortlist
KINGRVER 6 Gallon is a gas, electric or hybrid heater with a remote controller that sets 104 to 140 degrees F. The listing says gas mode uses 12 volt DC ignition and the unit fits common Suburban, Atwood and Dometic setups.
Against CAMPLUX Black, it uses a remote controller. Against a true tankless heater, it stores a reserve.
It suits owners who want remote control of a 6 gallon hybrid. It is a natural fit for remote-control drop-ins.
Key dimensions & specs
- 6 gallon hybrid
- Remote 104 to 140°F
- 12V DC gas ignition
Pros
- Remote controller included
- Gas, electric or hybrid mode
- Fits common 4 to 6 gallon setups
Cons
- Not a tankless heater
- Needs 3 inches of added clearance
How We Built This Shortlist
Each pick was assessed across 5 criteria weighted for real-world use.
- Tank or tankless
- We confirmed that both picks are tank heaters.
- Fit
- Direct-replacement and cutout claims were compared.
- Controls
- Interior panel and remote control were compared.
- Fuel modes
- Propane, electric and hybrid modes were compared.
- Limits
- Items that do not match the search were flagged.
What Matters Before You Choose a Tankless Replacement For 6 Gallon RV Water Heater
Key buying criteria so you get the right fit the first time.
Tank is not tankless
A 6 gallon tank stores hot water and recovers slowly, while a tankless unit heats as water flows. Neither pick is tankless. Read the title for tankless.
Cutout fit
Both list 4 to 6 gallon cutouts. KINGRVER needs added clearance. Measure before buying.
Control type
An interior panel or remote lets you change temperature without going outside. CAMPLUX uses a panel and KINGRVER a remote. Check the control type.
Fuel modes
Hybrid mode uses propane and electric together. It helps recovery on hookups. Check the listed modes.
Anode rod
A porcelain-lined tank with an anode rod resists corrosion. CAMPLUX lists both. Inspect the rod each year.
Real tankless needs
A tankless swap needs a 12 volt supply and a larger burner. These picks do not. Check the guide for tankless units.
Match a Tankless Replacement For 6 Gallon RV Water Heater to Your RV
By Control Preference
| Your situation | Recommended pick | Why |
|---|---|---|
| Interior panel | CAMPLUX Black | Panel for modes and temperature. |
| Remote | KINGRVER 6 | 104 to 140°F remote. |
| Black access door | CAMPLUX Black | Black finish. |
| Gas ignition from RV 12V | KINGRVER 6 | 12V DC ignition. |
Scroll sideways to see every column.
By Budget
| Budget | Recommended pick |
|---|---|
| $390 to $400 | CAMPLUX Black |
| $390 to $400 | KINGRVER 6 |
Panel vs Remote
- Interior panel
- CAMPLUX Black sets modes and temperature from a panel inside the RV.
- Remote
- KINGRVER 6 uses a remote that sets 104 to 140 degrees F.
Most owners should choose CAMPLUX Black unless they prefer a remote.
By Budget
| Budget | Recommended pick |
|---|---|
| Lower cost | CAMPLUX Black |
| Similar cost | KINGRVER 6 |
| Remote | KINGRVER 6 |
| Panel | CAMPLUX Black |
For Owners Who Want Tankless Specifically
- Look for
- A tankless listing with a 12 volt supply and a larger burner, not a 6 gallon tank, as the CAMPLUX Black listing shows.
- In this comparison
- Neither CAMPLUX Black nor KINGRVER 6 is tankless. Use the tankless heater guides for FOGATTI, ORBEK or Ranein options.
When to Spend More
- Spend more if
- Spend more on CAMPLUX Black or KINGRVER 6 only if you accept a tank.
- Save if
- Save by keeping CAMPLUX Black or KINGRVER 6 out of the cart if a tankless swap is the goal, and by choosing a tankless unit instead.
Before You Bring One Home
Are these tankless heaters?
No. CAMPLUX Black and KINGRVER 6 are 6 gallon tank heaters.
What is the common mistake?
Buying a tank when you wanted tankless. Read the title.
Is CAMPLUX worth more than KINGRVER?
For an interior panel, yes. KINGRVER 6 uses a remote.
How do I install one?
Follow the manual for gas, water and venting. Check the cutout.
Where do I find a real tankless heater?
See the propane tankless guides. Check cutout and 12 volt supply.
Bottom Line
Best overall: CAMPLUX 6 Gallon RV Water Heater — best overall pick in this roundup. See the full verdicts above for every pick, with pros, cons and who each one suits.
Browse all tankless replacement for 6 gallon rv water heater on Amazon — Prime-eligible options with current pricing.