Tank Warmers In RV’s

Tank warmers in RVs are devices designed to prevent the water in your RV’s holding tanks from freezing during cold weather. They are particularly useful for extending the camping season into winter or for travel in cold climates. Here’s how they work and what you need to know:

How Tank Warmers Work

  1. Electric Heating Pads:
    • Tank warmers are typically electric heating pads that are adhered to the bottom or sides of the RV’s water tanks, including:
      • Freshwater tank
      • Greywater tank
      • Blackwater tank
    • These pads generate gentle, consistent heat to keep the water in the tanks above freezing.
  2. Thermostatic Control:
    • Many tank warmers are equipped with thermostats that automatically turn the heaters on when temperatures drop near freezing (usually around 35°F/1.7°C) and off when temperatures rise above a set threshold.
    • This feature helps conserve energy while ensuring the tanks remain protected.
  3. 12-Volt or 120-Volt Power:
    • Tank warmers can be powered by:
      • 12-volt DC power: Allows use while boondocking (dry camping) using the RV battery.
      • 120-volt AC power: Used when connected to shore power or running a generator.
  4. Insulation Enhancement:
    • Tank warmers work more efficiently when the tanks are insulated, as the insulation helps retain the heat generated by the warmers.

Installation and Operation

  1. Placement:
    • Tank warmers are installed directly onto the holding tanks. Adhesive backings ensure the pads stay securely in place.
  2. Connection:
    • They are wired into the RV’s electrical system and controlled by a switch or integrated into the RV’s heating system.
  3. Switching On:
    • Most RVs have a control panel or a switch labeled “Tank Heaters.” Turn this on when temperatures drop below freezing.

Types of Tank Warmers

  1. Built-In Tank Warmers:
    • Installed by the RV manufacturer, they are integrated into the RV’s electrical system and may come with automatic controls.
  2. Aftermarket Tank Warmers:
    • Can be purchased and installed on RVs that do not come equipped with them. They are relatively easy to install for DIY enthusiasts.

Advantages of Tank Warmers

  1. Prevents Freezing:
    • Protects your water system from freezing, avoiding costly damage or tank replacements.
  2. Extend Your Camping Season:
    • Allows you to camp comfortably in freezing conditions without worrying about your water supply or waste disposal systems.
  3. Energy Efficient:
    • Thermostatically controlled warmers use energy only when necessary, reducing power consumption.

Considerations

  1. Power Source:
    • Ensure you have enough battery power or access to shore power, as tank warmers can drain batteries if used continuously without recharging.
  2. Insulation:
    • Properly insulate exposed pipes and tanks to maximize the efficiency of the tank warmers.
  3. Weather Monitoring:
    • Turn the tank warmers on before the temperature drops below freezing to avoid damage.

Additional Tips

  • Protect Drain Lines: Consider using pipe heaters or heat tape on exposed drain lines.
  • Skirting the RV: Adding skirting around the base of the RV helps retain heat and protect tanks.
  • Check Compatibility: If installing aftermarket tank warmers, ensure they are compatible with your RV’s tank material and electrical system.

Tank warmers are an essential feature for winter RVing, helping to maintain functionality and protect your water system in freezing conditions.