Ranein Gen II 4-Gallon Mini-Tank Water Heater — 120V, 1440W, Instant Hot Water for Under-Sink or RV

Fast hot water at the point of use

The Gen II Ranein 4-Gallon Mini-Tank Water Heater brings rapid, reliable hot water exactly where you need it. Powered by a 1440W molybdenum-gold heating rod, this compact unit delivers impressive thermal efficiency and quick recovery, so kitchens and bathrooms stay comfortable without waiting for a full-size heater.

Key performance highlights include a high-efficiency design rated near 99%, and an adjustable temperature range from 86°F to 167°F. This means you can dial in the warmth you prefer for dishwashing, handwashing, or quick rinse cycles, without wasteful heat loss or overshoot. The unit is designed for point-of-use comfort, making everyday tasks smoother and more convenient.

Space-smart, under-sink friendly

With dimensions of 20" x 10" x 10", the Gen II model fits neatly under most sinks or inside compact cabinetry. Its modern form emphasizes space efficiency, so you can keep cabinets organized while still enjoying instant hot water. Please reserve safe installation space—about 2 inches on both sides and 5 inches on the top—to ensure easy access for service and safety.

Simple, safe installation and operation

Setup is straightforward thanks to standard 1/2" NPT water connections and 120V power. The unit ships with a 43-inch power cord and operates safely up to 150 PSI water pressure. For electrical safety, a 15-amp circuit is recommended. A quick tutorial video is available to guide you through the installation and initial setup.

Durability you can rely on

Construction emphasizes longevity: a triple-layer inner tank—including an enamel coating, high-density reinforcement, and a decarburized steel plate—helps resist corrosion and maintains leak-proof performance over time. The heater is engineered with IPX4 waterproof protection and robust safety features to provide dependable operation. A 2-year warranty and responsive customer support add further peace of mind.

Two practical use-cases you’ll love

• Apartment or small-space kitchens where full-sized heaters aren’t feasible.
• RVs, campers, or outdoor setups needing reliable on-demand hot water without bulky equipment.

What you gain at a glance

• Fast hot water with a 1440W heating rod and high thermal efficiency.
• Wide temperature control from 86°F to 167°F for customized comfort.
• Space-saving under-sink design that fits tight cabinets and narrow installations.
• Easy installation with standard fittings, 120V power, and a ready-to-connect cord.
• Durable, corrosion-resistant tank construction and IPX4 safety rating for reliable use.