RV Water Heater Replacement Cost: What to Expect in 2026

Replacing an RV water heater costs $420 to $580 in parts for a DIY same-brand tank swap, or $700 to $1,800 fully installed at a shop. Component repairs (thermostat, igniter, heating element) run $50 to $400 and skip the need for a full replacement most of the time. Upgrading to tankless costs $900 to $2,500 all-in and is the right move for some owners and overkill for others.

Why RV water heater costs vary so much

Three things drive the range: who makes it, what failed, and whether you’re swapping in-kind or changing configurations.

Suburban and Dometic (which absorbed the Atwood line years ago) together cover 90% of the RVs on the road. Parts for both are widely stocked. A Suburban-to-Suburban swap on a matching 6-gallon opening is about as straightforward as RV appliance work gets. A cross-brand swap, an oversized tank, or a tankless conversion each add complexity and labor hours.

What failed matters just as much as what you’re replacing. An igniter that won’t spark is a $20 part and 30 minutes of work. A corroded tank is a full replacement job. In between sits a range of circuit board, gas valve, and thermostat failures that are worth repairing on a relatively young unit and worth skipping on one that’s already 10-plus years old.

Repair vs. replace: what each failure actually costs

Not every dead water heater needs a new water heater. The table below covers the most common failure modes and what they realistically cost to address.

The rough rule: if the part cost plus labor stays under $400 and the unit is under 8-10 years old, repair wins. Once the repair quote approaches half the cost of a new unit, get a replacement quote before authorizing the work.

What a new tank unit costs by type and brand

Suburban

Suburban dominates the RV OEM market with a steel tank protected by a magnesium anode rod. Their SW-series and the newer SAW-series (designed as a drop-in Atwood replacement) are stocked at virtually every RV parts supplier.

Current retail pricing from online suppliers (verified June 2026):

• SW6D (6-gal, gas-only, DSI): $419-$445
• SW6DE (6-gal, gas-electric dual-fuel): $488-$575
• SW10D (10-gal, gas-only): $506
• SW10DE (10-gal, dual-fuel): $577-$760
• SAW6D (6-gal, Atwood-replacement, gas-only): $506
• SAW6DE (6-gal, Atwood-replacement, dual-fuel): $508-$580

Add $150-$450 in labor for a professional same-brand swap (2-4 hours at $75-$150/hr).

Dometic (formerly Atwood)

Dometic uses an aluminum tank that handles corrosive water chemistry differently than steel. No anode rod is needed or used; a plastic drain plug takes its place. The WH-series is the current product line:

• WH-6GEA (6-gal, gas-electric): $550-$700
• WH-10GEA (10-gal, gas-electric): $750-$950

Dometic units are a direct drop-in for existing Atwood openings. If your rig came with an Atwood and you’re replacing it with a Dometic, the swap is straightforward and no adapter bracket is needed.

The anode rod difference in plain terms

Suburban tanks are steel with an enamel coating. The steel needs a sacrificial anode rod to keep minerals in the water from attacking the tank. Suburban’s OEM magnesium anode rod costs $16-$20 and should be replaced annually. Skip it for two or three seasons and the tank itself corrodes, eventually requiring full replacement. The annual $20 part is the single most cost-effective maintenance item on a Suburban water heater.

Dometic and Atwood tanks are aluminum. Aluminum doesn’t need anodic protection, so there’s no anode rod and no annual replacement requirement. The tradeoff is that aluminum tanks can develop leaks at fittings and around the drain plug more readily in rigs that get a lot of vibration, though this is uncommon on well-maintained units.

Tankless upgrades: Fogatti, Girard, and what they actually cost

Tankless water heaters heat on demand rather than maintaining a stored tank. No recovery time between showers, no energy wasted keeping 6 gallons hot while you’re driving. The practical downside is higher upfront cost and a more involved installation.

The two brands with the most traction in the RV market right now:

Fogatti InstaShower 8 Plus (55,000 BTU, 2.9 GPM): $570 on the Fogatti website (sale price from $700). This is the most popular budget-friendly entry into RV tankless. It’s CSA and ETL certified, works up to 9,800 feet elevation, and ships with a retrofit door in three size options. DIY-friendly for owners who are comfortable with propane connections. A direct replacement for Suburban, Atwood, Dometic, Girard, and Furrion footprints.

Girard GSWH-2 (42,000 BTU): $849-$1,000 depending on the retailer. Girard (now part of Lippert) commands a premium for build quality and has a long track record with full-timers. The GSWH-2 requires purchasing the access door separately, which adds $100-$150 to the cost. Installation labor runs 5-8 hours for a tankless conversion, adding $375-$1,200 at professional rates.

Full tankless upgrade cost summary:

• DIY Fogatti: $570-$700 in parts + materials
• DIY Girard: $950-$1,150 in parts
• Professional Fogatti install: $950-$1,900 all-in
• Professional Girard install: $1,325-$2,350 all-in

The key question is whether the conversion requires cutting or patching the exterior wall opening. Same-footprint swaps are clean. Changing from a 10-gallon tank opening to a smaller tankless footprint usually needs a cover plate or exterior panel work, which adds $100-$300.

Gas-only vs. dual-fuel: which to buy

Most RV water heaters sold today are dual-fuel: a propane gas burner for boondocking and an electric heating element for shore power. Gas-only units are cheaper ($420-$510 for a 6-gallon Suburban) but give up the shore-power option.

For campground campers with 30-amp or 50-amp hookups, dual-fuel is almost always worth the $50-$150 premium. The electric element heats efficiently on shore power and takes pressure off the propane supply. For full-time boondockers, gas-only is fine and costs less upfront.

One note on DSI: direct spark ignition (DSI) is the standard on virtually every RV water heater built since the mid-2000s. If your rig has an older manual-ignition or pilot-light unit, a DSI replacement adds convenience and is usually the same price as any other new unit.

Can you swap an RV water heater yourself?

For a same-brand, same-size tank swap on an identically-sized opening, yes, and many owners do it. The job sequence: turn off propane and electricity, drain the tank, disconnect water lines, disconnect gas line, remove the exterior door and mounting screws, pull the old unit, slide in the new unit, reconnect in reverse order, open the cold water supply to fill the tank (critical before energizing the electric element), purge air, then test. A propane leak test with soapy water on all connections is not optional.

The parts that make DIY harder: propane connections require confidence and care, and in some states a licensed tech is required to touch the gas side of any appliance. A tankless conversion is a harder job with more variables, covering gas line BTU capacity, venting clearances, and wiring for the 12V ignition controller.

For component repairs, most owners handle anode rods, heating elements, and thermostats themselves without much trouble. A circuit board or gas valve swap is also doable but requires confirming the exact part number before ordering; wrong boards can damage an otherwise-functional unit.

What extended warranty coverage looks like for water heaters

Most extended warranty contracts for RVs cover mechanical breakdown of the water heater, including the circuit board, gas valve, heating element, and thermostat when failure is due to a defect. Normal wear items, like the anode rod, are not covered under any policy. Neither is damage from neglected maintenance (a corroded tank from a missing anode rod is typically excluded).

The appliance benefit cap is the thing to check. Some contracts cap water heater coverage at $500, which covers a component repair but falls short of a full unit replacement at $500-$900 in parts alone. Review your contract’s “Appliances” section before assuming a full replacement is covered. For a broader look at what these contracts cover and what they don’t, the extended warranty cost guide covers contract structures and benefit caps in detail.

Whether a warranty claim makes sense depends on how old the unit is and what failed. A circuit board failure on a 4-year-old water heater is exactly what warranty coverage exists for. A corroded 12-year-old tank with a history of missed anode service is unlikely to result in a covered claim.

How water heater cost compares to other RV systems

A water heater replacement sits at the low end of major RV systems work. For comparison, the furnace replacement guide covers a job that runs $800-$2,500 for a full furnace swap, and the refrigerator replacement guide covers a category where units alone run $800-$2,000 for residential-style models. Water heater replacement is typically the least expensive systems appliance job in an RV, which is part of why repair is usually worth evaluating first.

The RV systems cost overview covers heating, cooling, water, and electrical at a summary level if you’re budgeting for multiple systems in the same year.

For context on the full warranty picture across appliances and systems, what RV extended warranties cover breaks down policy types and exclusions.