BISELONG

110V-120V 1440-1500W Small Under Sink Tank 2 5 Gallon Water Heater Hot Storage Mini Instant Electric RV TR

764+ bought in the past month

$99.98$449.99

About this item

  • 【Rapid Temperature Recovery】The BISELONG water heater is made from 0.04inch (1.1mm) thick 304 stainless steel and uses laser welding technology, ensuring it never rusts, withstands high pressure, and doesn't leak! The 1500w "L" shaped heating element increases the heat exchange area with the water in the tank, speeding up the heating process and eliminating the long wait for hot water beside the sink! (It can heat up to your desired temperature in 8-15 minutes for up to two sinks at a time).
  • 【Energy-Saving Smart Inverter】Automatically keeps water warm and stores hot water. The compact 2.5-gallon tank can be installed under the sink, with a thermal efficiency of 99% and a maximum temperature of 149℉. It has a built-in smart chip that heats to the temperature you set, and when it reaches the desired temperature, it automatically insulates to keep the heat in.Additionally, it helps reduce scale buildup!
  • 【Compact Design Saves Space】BISELONG has always been committed to original design! Its compact, square design makes this water heater ideal for homes, under sinks, RVs, food trucks, and more. It can be installed in cabinets or used in conjunction with washing machines and dishwashers. The product dimensions are 13.0''L x 11.4''W x 10.6''H inches.
  • 【Easy Installation】Water connection tube is 1/2''FPI, electrical requirements: 120v (AC), single voltage: 1500w with plug connection wire, maximum water pressure 108PSI, recommended circuit breaker rating: 15Amps, BISELONG electric water heater can be installed on walls or floors, in a concealed position.
  • 【Safety protection】 Certified by CE, ROHS, and FCC for safety and reliability. Electrical insulation at the entrance/exit. Leak proof plug. High quality insulation material with high temperature limiting device and automatic temperature control. Multi layer protection ensures safety.
  • 【Product Upgrade】On June 25, 2023, the product was fully upgraded—the water heater’s 304 stainless steel lining will be thickened to 0.04 inches (1.1 millimeters), providing a longer service life, and the unit weight increased to 8.4lbs (3.8 kilograms). The insulation material and foam insulation were replaced, improving the Improved insulation effect, making it more energy-efficient!
  • 【Customer Service】If there are any quality issues with the product or problems with installation, you can contact us at any time. Our customer service is online for 16 hours!!
  • 【Note】Due to the improvement in product quality, the warranty period for water heaters purchased after July 4, 2023, is 2 years. According to buyer feedback, some water heaters had quality issues. Based on the photos provided by the buyers, it was found that they mistakenly installed the pressure relief valve at the outlet (red end)!
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Product details

BrandBISELONG
Capacity2.5 Gallons
Power SourceAC
Product Dimensions11.2"W x 11.8"H
Special FeatureOverheat Protection, Rustproof

Technical specifications

brandBISELONG
product_dimensions11.2"W x 11.8"H
special_featureOverheat Protection, Rustproof
colorWhite
wattage1500 watts
voltage120 Volts
maximum_temperature149 Degrees Fahrenheit
heat_output1500 Watts
efficiency98%
styleProtection,Safety,Thermal
maximum_operating_pressure108 Pound per Square Inch
mounting_typewall mount or shelf mount
is_electricYes
manufacturerBISELONG
item_depth10.6 inches
upc708257587205
manufacture_year2023
item_weight9.5 pounds
item_model_numberBI-2.5
size13.0 x 11.4 x 10.6 inches
item_package_quantity1
special_featuresOverheat Protection, Rustproof
included_componentsT-tube, hose, safety valve
batteries_includedNo
batteries_requiredNo
best_sellers_rank#17,222 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Water Heaters
date_first_availableJanuary 1, 2020

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Customer reviews

4.01,258 ratings

Customers say

Customers find the water heater works well, providing hot water quickly and maintaining temperature effectively, with one mentioning it's suitable for outdoor kitchen use.

★★★★★

Small Under Sink Tank

Yessica BlancoOctober 26, 2025✓ Verified purchase

Excellent mini water heater — compact, powerful, and perfect for small spaces. Use: Ideal for sinks in bathrooms, RVs, offices, or kitchens where quick hot water is needed. Provides instant and consistent heat. Ease of Use: Simple to install with standard plumbing connections. Heats up quickly and maintains temperature well. Quality: Solid build, durable tank, and efficient heating element. Feels sturdy and dependable. Value for Money: Great value — affordable solution compared to full-sized water heaters, with excellent performance. Functionality: Heats water fast, maintains stable temperature, and operates quietly. Energy-efficient and reliable. Look: Compact and clean design that fits neatly under the sink without taking much space. ⭐ Highly recommended! Heats quickly, works flawlessly, and perfect for small hot water needs. Read more

★★★★★

WOW! If you need a small water heater, BUY this one! Hot Water, GREAT customer service!

Bob HeckmanAugust 27, 2025✓ Verified purchase

I had seen a couple of reviews by others, saying poor (or non-existent) customer service, low quality, didn't work, etc. But I was on a budget, in a hurry, and ordered it anyway. Took about 30 minutes to install (had to clean under my sink, first, LOL). Heater was great! hot water instantly, very satisfied. Then, about 6 months later, went to wash dishes, no hot water... checked all connections, power cord, everything looked OK, red light for HEATING was on, but nada. So, I went to work to get a warranty replacement. 7:29pm, Sunday, August 24, 2025 Sent message to seller telling them it went bad, requested replacement under warranty 8:06pm, Sunday, August 24, 2025 Received message from seller, requesting picture of heater 8:29pm, Sunday, August 24, 2025 Sent picture of heater to seller 8:48pm, Sunday, August 24, 2025 Received message from seller, instructing me to order replacement, and to let them know when the replacement was received; they would then issue a full refund. 6:20pm, Tuesday, August 26, 2025 Received replacement heater, sent message to seller * 6:58pm, Tuesday, August 26, 2025 Received message from Seller, full refund was issued. Now, I was in the retail auto parts business for many years, and I know that occasionally parts, gears, motors, etc. do go bad. Its not necessary poor quality, or poor quality control. Sometimes, S*** Happens. As I mentioned earlier in this review, I was very satisfied with the heater, instant hot water, worked great, happy with my purchase. But, S*** Happened.... I very seldom write reviews about purchases on Amazon, and even less often do I review customer service, mainly because I have not had any problems with customer service, either from Amazon or other sellers. But I had to write a VERY POSITIVE REVIEW on this product, and the GREAT CUSTOMER SERVICE from the seller! Just imagine, less than 48 hours to resolve the issue and have a warranted replacement in my hands! It don't get much better than that, folks! Read more

★☆☆☆☆

Works fine at first.

JBercApril 14, 2024✓ Verified purchase

This is a nifty little heater and it worked great at first. It was very easy to install and it provided fast, hot water as expected. However it began leaking at the top of the pressure release valve, and when I looked into the issue, it turned out the gasket on my hose was bad. That wasn't a big deal, but as I was tightening the new hose on to the pressure valve, the brass snapped at the pipe threads. I've never seen a hand-wrenched brass fitting break in my own hands like that before, and the the valve design appears proprietary so not easy to find a replacement. So, in summary, it's a good little heater, but the hardware is junk. Update: I replaced everything sealing every leak on top. Now it is leaking from the bottom. This product is garbage. Read more

★★★★★

Compact, effective, easy to install

DaveFebruary 11, 2026✓ Verified purchase

Works great, easy to install, compact, exactly what we wanted. Read more

★★★★☆

good buy but read reviews before buying

RCDOctober 19, 2025✓ Verified purchase

Helps when you're in a pinch. read reviews first and purchased item. purchased it because I had to get for water line fixed. did not put dial all the way to hot. placed it a bit over half, and no issues with tripping the breaker and the water was warm you mildly hot good for a shower. this water heater worked as described but check reviews from other purchasers describing the unit tripping the breakers. I did not have that problem but I did use appliance/contractor grade cord. works going to install outside to give my dogs a warm water bath. overall I would say good investment. I understand from most reviews this companies customer service is horrible, really can't verify that but I don't expect this item to work past a year from what I read. just came in good when I needed it Read more

★★★★★

Like it

NamasteFebruary 25, 2026✓ Verified purchase

I got a compact utility sink in my studio. The underneath space is very limit. The water heater perfectly fits in the cabinet under the sink. Heat fast with 110v. Easy to install. It also comes with a T connector. Nice product Read more

★★★★★

Great product!

ChrisJanuary 18, 2026✓ Verified purchase

Works great! Easy install and fits perfect. Read more

★★★★★

Perfect Little Water Heater for My RV – Fast Heating & Reliab

sharrellAugust 14, 2025✓ Verified purchase

Installed this in my RV a few weeks ago and it’s been great. Heats up quickly, keeps the water at a steady temperature, and the 2.5-gallon capacity is perfect for daily use like washing hands, dishes, or light cleaning. It doesn’t take up much space, and installation was straightforward – just hooked up the water lines and plugged it in. It stays secure while driving, with no leaks or movement. A solid choice for RVs, boats, or any small space. Read more

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