Search  for anything...

Portable Water Heater 2000W, Pool Heater - Immersion Heater with Digital Thermometer, Upgraded Magnesium Oxide Heating for Fast Heating, for Small Pools, Bathtubs, Buckets, Tanks

  • Based on 121 reviews
Condition: New
Checking for inventory...

Notify me when this product is back in stock

$21.09 Why this price?
Save $8.90 was $29.99

Buy Now, Pay Later


As low as $5 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund / replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Unavailable
Fulfilled by Amazon
Available payment plans shown during checkout

Features

  • PROFESSIONAL SAFETY & AUTO SHUT-OFF This immersion water heater is your ultimate safety partner. The intelligent system automatically powers off the 2000W heating element once water hits the perfect temp of 165F (75C), preventing scalding risks. The durable stainless steel build resists rust. Remember: Always fully submerge this bucket heater in water before plugging into a 110V outlet to avoid damage or fire hazard.
  • RAPID 2000W HEATING POWER Say goodbye to cold water! Our 2000W high-efficiency portable water heater rapidly takes the chill off, warming up 5 gallons in just minutes. It's the perfect pool heater for inflatable pools, small stock tanks, and buckets. The perforated guard maximizes heat dispersion for faster, more even heating. Pro Tip: For larger tubs, use multiple units on separate circuits to speed up the process.
  • ULTIMATE PORTABILITY FOR ANY SCENE Your go-to heating solution anywhere! This lightweight and compact immersion heater is ideal for camping, farms, garages, or bathrooms. Use it effortlessly as a hot tub heater for portable spas, a pool warmer for kiddie pools, or to heat water for chores and pets. Critical: Keep it 3+ feet away from gases or flammables during operation.
  • SMART LCD TEMPERATURE MONITORING Precision heating at a glance! The built-in digital thermometer displays real-time water temperature, so you never have to guess. A clear power indicator light lets you know it's working. Just immerse, plug in, and monitorits that easy! Always ensure no people or pets are in the water while this pool heater is running.
  • COMPLETE KIT & WORRY-FREE WARRANTY Everything you need is in the box: the FIVECUBS immersion heater, LCD thermometer, and user manual. It makes a practical gift for anyone. Your satisfaction is 100% guaranteed. Our US-based support team is ready to assist you with any questions or needs.

Material: Stainless Steel


Voltage: 110 Volts


Brand: FIVECUBS


Color: Black


Wattage: 2000 kWh


Material: ‎Stainless Steel


Voltage: ‎110 Volts


Brand: ‎FIVECUBS


Color: ‎Black


Wattage: ‎2000 kWh


Item Weight: ‎0.7 Pounds


Manufacturer: ‎FIVECUBS


Part Number: ‎RSB02


Item Weight: ‎11.2 ounces


Product Dimensions: ‎10 x 2 x 2.7 inches


Item model number: ‎RSB02


Item Package Quantity: ‎1


Included Components: ‎Digital Thermometers


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: June 24, 2025


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Portable Immersion Water Heater
The digital thermometer makes it easy to monitor the temperature. Use the temperature detector device. This portable water heater is surprisingly powerful and heats water fast — good for filling up bathtubs, small pools, or large buckets. Just make sure you follow the safety instructions and never plug it in until it’s fully submerged. It’s compact, easy to use, and the magnesium oxide heating element feels like a durable upgrade. Great tool to have on hand, especially for colder months or outdoor use! Perfect size, really works and within minutes the water gets really hot. It can used for heating water when camping. Super convenient and reliable. ... show more
Reviewed in the United States on November 20, 2025 by Shaan K Shaan K

  • This Thing Is AMAZING!
Wow! Didn't have much faith that this would heat our avoce-graound 24"H 8'W pool. My son and his wife were visiting Arizona in late October-early November. Had the pool ready, but it was way too cold. Bought this ...and overnight the pool was warm!! Amazing!! Highly recommend!!
Reviewed in the United States on November 2, 2025 by Susan Klein

  • Regret, Regret. Do not buy.
If i could rate this a flat ZERO... Not only does it not heat up a tub of water, it was giving an electrical burning smell from the outlet. Proceeded to unplug it, fearing an electrical fire. DO NOT BUY. Even at a discount. Just boil your water in a stove pot for a bath instead.
Reviewed in the United States on November 16, 2025 by Luke Luke

  • Well price product
I do really like this product it's a good size and it seems really safe to use as well and easy to install it's not too complicated durability is going to take me awhile to find out pretty good money value but for the price it is actually fantastic and pretty functional
Reviewed in the United States on November 20, 2025 by Number one Number one

  • Works Good
I have an outdoor pond that gets freezing and tries to ice over when ver cold. I’ll put this in there to warm it up works great and warm it up fast!
Reviewed in the United States on November 21, 2025 by Lindsi

  • Doesn’t seem to heat very fast at all
Most of the people in here have said that it heats fast and that it came with two mine only came with one not two and I’ve had it in my bathtub, which is very shallow for almost 40 minutes and it’s only at 70°. My water heater is broken and I just need to be able to take a warm bath cause I’m currently dealing with pneumonia, but this is taking a very long time all of these People who have written reviews said it was very fast. It’s not heating very fast at all and again only came with one even though one of the pictures even shows two in a bathtub and most of the reviews say that two came in a package. ... show more
Reviewed in the United States on October 27, 2025 by thequeenbeesus

  • Worked Well-Until Cord got Hot
Worked well first couple uses but after that cord got warm so stopped using. Was great deal for 200” watts did great job warm water fast but I didn’t want to have fuse blow out so I stopped
Reviewed in the United States on November 18, 2025 by Casey at the Bat

  • Good purchase
Love this! Works well and fast. It doesn't have a switch, so I have it on a surge protector power strip so I don't have to unplug it.
Reviewed in the United States on November 16, 2025 by Arvella

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for inventory...