Haster 1500W Portable Immersion Water Heater for Inflatable Pools & Bathtubs — 304 SS Guard, LCD Thermometer

HASTER's portable 1500W immersion water heater quickly warms small pools, tubs, buckets and inflatable pools with a stainless steel guard and built-in LCD thermometer.

This compact electric submersible heater is designed to raise the temperature of small volumes of water fast — the 1500W element can warm roughly 5 gallons in minutes. Built with a 304 stainless steel protective sleeve and an LCD temperature readout, the unit balances quick heating with simple monitoring and portability for home use, camping, and seasonal pool maintenance. It must be fully submerged for safe operation and is UL certified for electrical safety.

How fast will this heater warm my water?

The 1500W power output is tuned for small containers, so you’ll see significant temperature gains in short periods. For example, around 5 gallons can reach comfortable warmth within minutes depending on starting temperature and ambient conditions.

• 1500 watts of heating power for rapid temperature rise
• Designed for small volumes: tubs, buckets, basins, and mini inflatable pools
• Actual time varies by initial water temperature and outside air temperature

Is this safe to use in a bathtub or inflatable pool?

Safety features include a 304 stainless steel guard that prevents direct contact with the heating element and reduces corrosion over time. The product is UL certified and includes a leakage-protection plug, but the heater must always be fully submerged while in use and removed before entering the water.

• 304 stainless steel cover protects the element and reduces rust
• Leakage-protection plug adds electrical safety (not a power switch)
• Always unplug and remove heater before putting hands or body into the heated water

How do I operate and monitor the temperature?

Operation is straightforward: immerse the heater fully, connect to a grounded outlet, and read the water temperature on the integrated LCD thermometer. The display lets you track progress so you can stop heating once the desired temperature is reached; continuous use is recommended to be limited to three hours.

• Plug into a properly grounded outlet; check socket condition before use
• Built-in LCD thermometer shows current water temperature
• Recommended continuous run time: under 3 hours per session

What containers and situations is this best suited for?

The heater is intended for small- to medium-sized containers such as buckets, basins, baby bathtubs, and mini inflatable pools. It’s portable and lightweight, making it handy for indoor and outdoor tasks like warming water for washing, camping showers, or pre-heating a small portable pool.

• Works in buckets, basins, tubs, and small inflatable pools
• Portable design for home use, travel, or camping
• Not intended as the sole heater for large backyard pools

Who this is for: The HASTER portable immersion heater is aimed at homeowners, campers, and anyone who needs a quick, compact solution to warm small water volumes. It suits people who want a lightweight, easy-to-store heater for tubs, buckets, or mini pools, and who will follow the safety guidance to keep the element submerged and unplug before use. If you need to heat large outdoor pools, consider a purpose-built pool heater instead.