Facon 2Pack RV Tank Heater Pads with Thermostat, 12" x 18", 13.5V DC, QAI Certified, Prevents Freezing for Fresh, Grey, Black Water Tanks, 50 Gallon Capacity, Easy Installation, Energy Efficient

[Application] Pad size L 12'' x W 18'' works efficiently up to 50 gallon holding tanks, such as Fresh Water Tanks, Grey Water Tanks and Black Water Tanks. Please stick 2-3 pads to your tank if it larger than 50 gallon. [Easy Installation] 2-Wires Design without plug - Convenience for fixed place installation. Just wire this pad to 12Volt DC power supply and RV power switch. Red Wire=Positive (+); White Wire=Negative (-). 3mm Foam Insulation Pad with self-adhesive make it easy installation, no extra facility required. Please make sure the voltage for your RV is 12 Volts DC. Please order another size 8'' x 25'' pad in our store if you need to connect 120Volts AC Power(home voltage) International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.