Lukewarm water from your RV heater is typically caused by a failing heating element, sediment buildup, or thermostat issues. Most problems can be fixed by replacing the heating element, flushing the tank, or adjusting the thermostat.
While there's no direct plug-and-play replacement for the Atwood GC10A-4E with a gas-only tankless unit, you can upgrade to dual-fuel tankless heaters like the Girard GSWH-2 or Truma AquaGo. These maintain electric capability while providing instant hot water and better efficiency.
Unfortunately, you cannot replace just the tank on a Suburban SW6P water heater - the tank and outer housing are manufactured as one integrated unit. When rust appears during flushing, it's time to replace the entire water heater.
To add electric heat while keeping the anode rod, look for kits that install in the drain port or use a combo anode/element. Avoid kits that replace the anode port entirely on cast iron tanks. The anode is critical for tank longevity.
Sanitize your RV water tank after extended storage, especially after hot Arizona summers. Use 1/4 cup bleach per 15 gallons, let sit 4+ hours, then flush thoroughly.
First-use odor is bacteria/biofilm in lines between trips. Filters only clean incoming water, not whats sitting in plumbing. Run all faucets 30 seconds before use. Sanitize system quarterly. Pay attention to hot water tank maintenance.
Popping and crackling sounds from your RV water heater are usually caused by sediment buildup on the heating element. While not immediately dangerous, you should drain and flush the tank to prevent damage and restore quiet operation.
Everything you need to know about RV plumbing systems from fresh water supply to waste management.
Replace Atwood GC6AA-10E with Dometic G6A-8E - its the same heater under new branding. Dometic acquired Atwood so mounting patterns and connections should match directly.
You can remove a Dometic 10-gallon water heater from behind the refrigerator by creating temporary access through the exterior compartment or carefully maneuvering connections from the front. Most cases don't require refrigerator removal with proper technique.