If you’re an RV owner, choosing the right water heater can make every trip more comfortable. Two of the biggest names you’ll see are Suburban Advantage and Atwood. Both brands are trusted, but which one is better for your needs? This comparison breaks down their differences, strengths, and weaknesses, so you can decide with confidence.
Why The Right Rv Water Heater Matters
A reliable water heater means hot showers, clean dishes, and a more enjoyable camping experience. But not all RV water heaters are the same. Features like heating method, tank size, efficiency, and ease of maintenance can change your daily comfort and long-term costs.
Picking between Suburban and Atwood isn’t just about brand—it’s about how their designs fit your travel style.
Overview: Suburban Advantage Vs Atwood
Before diving into details, let’s look at what sets these two apart.
- Suburban Advantage: Known for robust steel tanks with porcelain lining, strong heating power, and long lifespan.
- Atwood: Popular for lightweight aluminum tanks, quick heating, and easy installation.
But these are only starting points. Each has unique features that matter for different types of RVers.
Core Features Compared
Here’s a clear side-by-side look at some main technical details:
| Feature | Suburban Advantage | Atwood |
|---|---|---|
| Tank Material | Steel, porcelain-lined | Aluminum |
| Common Sizes | 6, 10, 12 gallons | 6, 10 gallons |
| Anode Rod Required | Yes | No |
| Heating Modes | Gas, Electric, DSI | Gas, Electric, DSI |
| Recovery Rate (6 gal.) | ~10.2 GPH (gas) | ~11.6 GPH (gas) |
| Weight (empty 6 gal.) | ~34 lbs | ~18 lbs |
| Freeze Protection | No | No |
Tank Material And Durability
The biggest difference is in the tank material. Suburban Advantage uses a steel tank with a glass (porcelain) lining. This design is tough and resists cracking but can rust if not maintained. That’s why Suburban tanks need an anode rod—a small sacrificial metal piece that attracts corrosion and protects the tank.
Atwood uses an aluminum tank. Aluminum naturally resists corrosion, so Atwood heaters don’t need an anode rod. This means less maintenance and one less part to replace. Aluminum tanks are also lighter, which can be important if you’re watching your RV’s weight.
However, steel tanks like Suburban’s are often considered more robust for long-term heavy use, especially if you change the anode rod regularly. Some RVers report Suburban tanks lasting over a decade with proper care.
Performance And Heating Power
Both brands offer gas, electric, and DSI (Direct Spark Ignition) models. DSI means you can ignite the heater with a switch inside the RV, not with a match outside.
When it comes to heating speed, Atwood has a slight edge. Its aluminum tank heats up faster because metal transfers heat more quickly and there’s less water mass in the tank shell. For example, the 6-gallon Atwood model can recover about 11.
6 gallons of hot water per hour on gas, while Suburban’s comparable model is around 10. 2 gallons per hour. This difference matters if you have a big family or take longer showers.
But, Suburban’s higher-wattage electric element (sometimes up to 1440W vs. Atwood’s 1400W) means electric-only heating is almost equally fast.
Maintenance And Longevity
Suburban Advantage units need more regular checks. The anode rod should be inspected at least once a year and replaced when it’s 50% worn. If ignored, corrosion can eat through the tank and cause leaks. The drain plug must also be checked for mineral buildup.
Atwood units are simpler—no anode rod, and the drain plug is plastic, making it easy to remove for winterizing. However, aluminum tanks can suffer from mineral deposits if you have “hard water.” Regular flushing is recommended for both brands, but it’s faster with Atwood.
A non-obvious tip: Using a water filter at your city water hookup can reduce mineral problems for both types, especially if you travel to areas with hard water.
Size And Installation
Suburban offers a 12-gallon model, which is great for large families or frequent hot water use. Atwood tops out at 10 gallons. If you have a big class A motorhome or travel with a group, Suburban’s larger tank can make a difference.
But Atwood’s lighter weight and smaller size make it perfect for smaller trailers and campers. Many people upgrading from a basic 6-gallon model find Atwood fits more easily into tight spaces.
Here’s a quick installation-focused comparison:
| Brand | Typical Installation Time | Ease of Replacement |
|---|---|---|
| Suburban | 2–3 hours | May require extra bracing due to weight |
| Atwood | 1–2 hours | Lighter, easier to handle |
Cost And Value
Price differences are small but worth noting. Atwood heaters are often slightly less expensive, mainly because of the simpler tank and fewer maintenance parts. But this varies by model and retailer.
Don’t forget to include maintenance costs. Suburban owners should budget for anode rods (about $15–$20 each, replaced every 1–2 years). Atwood heaters don’t need these, but may need more frequent flushing if you use hard water.
It’s also smart to consider resale value. Some RV buyers prefer Suburban’s heavy-duty build, while others like Atwood’s low-maintenance reputation. Neither brand will hurt your RV’s value, but Suburban’s steel tank may sound more impressive to buyers who plan long-term use.
Energy Efficiency
Both brands perform similarly in terms of energy use. Gas models use about 8,800–10,000 BTUs for a typical 6-gallon tank. Electric models draw around 1400–1440 watts. Most users won’t notice a major difference in utility costs between the two.
However, Atwood’s faster heating can mean less time running the burner or element, which may save a little energy over time. If you camp off-grid and run on propane, faster recovery can be a small advantage.
Safety And Reliability
Both Suburban and Atwood are trusted for safe operation. All modern models have built-in pressure relief valves and temperature cutoffs. DSI systems add convenience and reduce the chance of accidents during lighting.
One small but important detail: Suburban’s heavier design makes it less likely to move or shift in its compartment during rough travel. Atwood’s lighter weight is good for towing, but you must check that it’s securely installed.
Real-world User Experiences
Looking at owner forums and RV groups, opinions are split. Here are some typical real-world comments:
- Suburban users praise the long lifespan when properly maintained, and the ability to handle heavy use.
- Atwood owners love the quick heating and low maintenance, especially not having to change anode rods.
- Some users who switch brands report a learning curve with maintenance—Suburban users sometimes forget the anode rod, while Atwood users may be surprised by mineral buildup if they use hard water.
- Both brands have replacement parts widely available, but Suburban’s heavy tank can be harder to swap out if it fails.
A non-obvious insight: If you often camp in freezing weather, neither brand has built-in freeze protection. Owners must drain the water heater before winter or risk expensive damage.
Which Should You Choose? Key Scenarios
The best RV water heater depends on your camping style, not just the brand name. Here are scenarios to guide your choice:
- You want the lowest maintenance: Atwood is the winner. No anode rod and easy draining.
- You need a large supply of hot water: Suburban’s 12-gallon model is best.
- You tow a lightweight trailer: Atwood’s aluminum tank keeps weight down.
- You plan to use your RV for 10+ years: Suburban’s robust steel tank may last longer if you replace the anode rod.
- You camp in hard water areas: Suburban can handle minerals better with regular anode changes. For Atwood, flushing is crucial.
- You want fast hot water recovery: Atwood’s aluminum tank heats up a bit faster.
How To Make Your Water Heater Last
Regardless of your choice, you can extend the life of your water heater by:
- Flushing the tank every 6–12 months to remove sediment
- Using a water filter to reduce minerals
- Checking for leaks around fittings and the tank
- Winterizing before freezing temperatures hit
- For Suburban, replacing the anode rod before it’s fully corroded
Many RVers overlook regular flushing, which is as important as changing the anode rod (for Suburban) or using the right plug (for Atwood).
Final Verdict: Suburban Advantage Or Atwood?
Both Suburban Advantage and Atwood make quality RV water heaters, and each is the “better” choice for different needs. If you want a tough, long-lasting tank and don’t mind a little extra maintenance, Suburban is the classic favorite. If you prefer easy care and lighter weight, Atwood is hard to beat.
For most casual campers, the differences won’t dramatically change your experience. But if you pay attention to maintenance and know your travel habits, you’ll be happy with either.
For more technical comparisons and user guides, the RV Forum Network is a helpful resource.
Frequently Asked Questions
What Is An Anode Rod, And Why Does Suburban Use It?
An anode rod is a metal rod inside the water heater tank that attracts corrosion, protecting the steel tank. Suburban uses steel tanks that need this protection. Atwood’s aluminum tanks don’t need anode rods because aluminum resists corrosion naturally.
Can I Replace An Atwood With A Suburban Heater (or Vice Versa) Easily?
Switching between brands is possible but not always simple. The tanks are different sizes and use different mounting brackets. You might need to adjust the opening in your RV, change plumbing connections, or add new support for the heavier Suburban tank.
Which Brand Is Better For Off-grid (boondocking) Camping?
Both brands work well off-grid using propane. Atwood’s faster recovery can be helpful if you need hot water quickly. Suburban’s larger tank can store more hot water, useful for groups. Neither brand is clearly superior for boondocking.
How Often Should I Flush My Rv Water Heater?
Flushing every 6–12 months is best, especially if you use hard water or camp for long periods. This removes sediment and helps both Suburban and Atwood heaters last longer.
Are Parts And Service Easy To Find For Both Brands?
Yes, both Suburban and Atwood have good support and widely available replacement parts. Most RV repair shops can service either brand, and you can find parts at RV dealers or online.
Choosing the right RV water heater—Suburban or Atwood—is about matching their strengths to your needs. With a little care, either can provide years of hot showers and comfort on the road.
