RV Water Heater Repair & Replacement

How much does an RV water heater replacement cost?

A 6-gallon Suburban or Atwood gas/electric replacement runs $785-$1,250 including parts, labor, and on-site dispatch. A 10-gallon Atwood runs $895-$1,395.

Tankless conversions to RecPro or Furrion run $1,150-$1,950. Those ranges cover the new unit, all install hardware, connection to your existing gas line or 120V circuit, and a pressure check once the unit is live.

The spread within each range comes down to whether the bypass valves need replacement, whether the anode rod was overdue, and whether the surrounding wood frame shows any water damage - soft or rotted framing around the heater bay adds time and material, and we call you before touching anything beyond the original scope. We quote a flat range by phone after a few questions about your rig, then write you an exact number on-site before any work starts.

How long does it take to replace an RV water heater?

Most 6-gallon tank swaps finish in 3-4 hours on-site. That covers draining the old unit, pulling it from the bay, setting the new heater and sealing the exterior access door, refilling the system, pressure-testing the connections, and running a full burner cycle to confirm heat and no gas odor.

Tankless conversions run 4-6 hours because we typically re-route the gas line for proper flow rate and add a dedicated 12V circuit for the controller board - two steps that have to be done right or the unit faults out under load. If we find corroded gas fittings or a water-damaged bay frame during teardown, that adds time, and we call you before continuing rather than just running the clock.

Can I replace my Atwood water heater with a Suburban or Dometic?

Yes - the standard 6-gallon and 10-gallon footprints between Atwood, Suburban, and Dometic are interchangeable in 95% of rigs, so a brand swap is usually a straightforward pull-and-set. We carry adapter plates on the truck for the rare cases where the exterior door frame or mounting flange doesn't line up cleanly, which adds maybe 20-30 minutes to the job rather than a return visit.

When we have the old unit out, we also check the bypass valves, anode rod, and the wood framing around the heater bay - water heaters that fail often do so slowly, and a soft spot caught at replacement is far cheaper than a full bay repair later. Pick the replacement brand based on parts availability and current pricing, not loyalty - all three perform reliably when the anode rod gets swapped on schedule and the burner assembly stays clean.

How do I know if my RV water heater is bad or just needs a flush?

Three signs point to replacement rather than a flush: you smell rotten egg even after installing a fresh anode rod (meaning the tank lining is breaking down, not just the rod); the burner lights but drops flame within 60 seconds (a thermocouple swap may fix it, but if the issue returns, the gas valve or control board is failing); or the tank weeps water from the underside of the rig, which means the tank wall has corroded through and no repair is practical. If you're just seeing slow heat-up or the unit short-cycles on and off, an annual flush clears sediment buildup and usually restores normal performance - we carry flush equipment on the truck and handle it flat-rate in about 45 minutes. The rotten egg smell is the one people wait too long on: a compromised tank can contaminate fresh water lines downstream, so it's worth addressing before it becomes a plumbing problem beyond the heater itself.

Are RV tankless water heaters worth the extra money?

For full-timers, the math usually works out in favor of tankless. RecPro units eliminate the standby heat loss that a tank heater runs up constantly, and dropping 35 lb off your rig matters if you're already tight on payload.

You also skip the annual mineral flush and anode rod replacement that a tank unit needs every season. The tradeoff is upfront cost and install complexity - tankless units draw a higher amp load or need a dedicated propane line sized correctly for the BTU demand, and if either is undersized you'll get a frustrating trickle of warm water instead of a hot shower. For weekend campers who plug in a few times a month, a standard Atwood or Suburban tank heater is simpler to troubleshoot, cheaper to replace, and rarely causes problems when it's maintained.

Why does hard water kill RV water heaters faster?

Hard water carrying 12-25 grains per gallon of dissolved calcium and magnesium - common across central Florida and parts of Idaho - coats the inside of the tank and heat exchanger with a layer of mineral scale every season. That scale acts as insulation between the burner and the water, so the burner has to run longer and hotter to do the same job.

Over 4-5 years without maintenance, the overheating trips the gas valve's high-limit safety repeatedly until the valve fails and won't reset. An annual flush and anode rod inspection removes most of that buildup before it hardens, and in our experience adds 5-7 years to the unit's service life. If you're already seeing slow recovery times or a burner that clicks but won't stay lit, scale is usually the first thing we check - it's a cheaper fix than a full replacement, but only if you catch it before the valve or element gives out.

Can you flush my water heater on the same day you replace it?

Most maintenance calls combine a flush with anode rod replacement and burner-orifice cleaning in a single visit - $145 flat, roughly 45 minutes of work. We drain the tank completely, pull the anode rod and inspect it for sulfation or depletion, flush the sediment out of the tank body, then clean the burner orifice before refilling and testing for proper ignition and temperature recovery.

That sequence matters because a clogged orifice and a worn anode rod usually fail together, and skipping either one shortens the life of a tank you just serviced. If we pull the anode rod and find active pitting or rust flake coming out of the drain, we inspect the tank walls before going further. A corroded tank won't hold pressure safely, so if we find that, we stop, photograph it, and give you a replacement quote on the spot before doing anything else.

Do you replace anode rods on Suburban water heaters?

Yes. Suburban tank-style heaters use a magnesium or aluminum anode rod that sits in a hex fitting on the tank and sacrifices itself to protect the steel tank walls from corrosion.

We carry both rod types on the truck, and when we're already on-site for a flush service, the rod swap adds no extra charge - it takes about ten minutes once the tank is drained and cool. If the rod has corroded down to the core wire or has heavy calcium buildup, we show it to you before threading in the new one.

Atwood heaters use a glass-lined tank and have no anode at all, so if you're switching brands, that maintenance step goes away entirely. Either way, annual rod inspection is the easiest thing you can do to extend tank life by several years.

What's the warranty on a new water heater you install?

Suburban and Dometic units carry a 2-year manufacturer warranty on the tank and 1-year on parts, and we register the serial number in your name at the time of install so the coverage starts immediately without any extra paperwork on your end. On top of that, A1 adds a 90-day workmanship warranty covering anything tied to how the unit was installed - a fitting we torqued, a burner connection we made, a bypass valve we seated.

If a leak or burner issue traces back to the install in that window, we come back at no charge. One thing worth knowing: manufacturer warranty claims on the unit itself go through Suburban or Dometic directly, but we'll give you the serial number, install date, and our documentation to make that process straightforward.

Will my new water heater work on shore power and propane both?

Most water heaters we install are dual-fuel DSI units that run on 120V shore power or LP gas, and we recommend that configuration for almost every rig. The practical reason is simple: when you're on a metered or 30-amp site, running the electric element costs you nothing extra and keeps your propane for cooking and heating.

When you're off-grid or boondocking, you flip to gas and you're not dependent on the electrical system at all. The dual-fuel option adds $40-$80 to the unit cost over a gas-only model, which most owners recover quickly in flexibility alone. The one edge case is a rig with no reliable 120V circuit near the heater bay - in that case we'll discuss whether running a new line makes sense or whether gas-only is the right call for how you actually use the coach.