🔥 Instant Hot Water, Zero Compromise!
The BISELONG 2.5-gallon mini under-sink water heater combines rapid 1500W heating with durable 304 stainless steel construction and smart energy-saving technology. Its compact design fits perfectly in tight spaces like kitchens, RVs, and food trucks, delivering up to 149°F hot water quickly and efficiently. Complete with installation accessories and safety features, it’s engineered for hassle-free setup and long-lasting performance.
Brand | BISELONG |
Product Dimensions | 11.2"W x 11.8"H |
Special Feature | Rustproof, Overheat Protection |
Color | White |
Wattage | 1500 watts |
Voltage | 120 Volts |
Maximum Temperature | 149 Degrees Fahrenheit |
Heat Output | 1.5E+3 Watts |
Efficiency | 98% |
Style | Protection,Safety,Thermal |
Maximum Operating Pressure | 108 Pound per Square Inch |
Mounting Type | wall mount or shelf mount |
Is Electric | Yes |
Manufacturer | BISELONG |
Item Depth | 10.6 inches |
UPC | 708257587205 |
Item Weight | 9.5 pounds |
Item model number | BI-2.5 |
Item Package Quantity | 1 |
Special Features | Rustproof, Overheat Protection |
Included Components | hose, T-tube, safety valve |
Batteries Included? | No |
Batteries Required? | No |
D**.
Best Ever
I almost never write reviews unless I feel a product is exceptional. This item is exceptional. It does everything right. It’s easy to install, with no special power requirements, sized to fit easily under a sink, has simple controls needed to provide whatever temperature you require.I have mine under the kitchen sink. Before I got this unit, I had two choices to wash my hands. Either let the water run for a long time to let warm water arrive, or wash my hands in frigid water. Neither was acceptable. Now I simply turn on the hot water and within seconds I get the correct preset water temperature for hand washing. Nice!In my opinion, it is one of the best items I’ve ever purchased, and it’s only $100.
L**R
Does the trick, and easy Install
Perfectly solved our need to get instant hit water in our high 2nd story bathroom, plus we used the included T-valve to easily split the line and feed a hot water bidet nearby. The water gets PIPING hot on the highest setting so we found that the middle setting is about right. The hot water only lasts for maybe 45-60 seconds at a time but that's enough for bathroom and bidet use (maybe not a kitchen sink).Very install install, although the instructions were quite vague. I'm a total plumbing novice but I figured it out. Maybe not the absolute best of this type of unit but it seems to get the job done!
J**C
Works fine at first.
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.
E**A
Works Great
Love this heater. However be prepare to purchase a 1/2" female-1/2" female under-sink hose 20"
D**C
Good value and works - steel tank has advantages
I bought this for my camper conversion, and I selected this over the other options mainly, because the tank is metal, and not glass-lined like the other competitor water heaters, as I know that a glass-lined tank will be a problem when it is time to winterize (if I forget and wait too late in the season, I feel a glass-lined thank would crack immediately). The installation was a bit tricky, because the included connecting piping did not fit my plumbing, but Home Depot solved that problem. The function was good. Note: I have a 2500 watt inverter in my camper van conversion, and this appliance caused the fan to come on immediately, which it has not done for other high draw appliances. I will measure it later with my kilowatt meter to verify the wattage compared to the stated specifications. The water was really hot, but uneven. It took about six minutes or less to heat the tank. I was able to get a five minute shower with my low-flow shower head (mixed with cold water).
C**O
THE BEST spent time/money for a house project
I've done a lot of home improvement projects, but this is hands down the one that I'm grateful every single day for.My kitchen sink is on the opposite side of the house from the heater, it took 3 minutes of running the tap to get hot water. Now it takes 3 seconds!It's truly such a sanity saver!I've had this installed for about 2 years now, never had any leaks or issues with it.When I installed it, it was awkward to get it in cause it's bulky and I had to have an electrician add an outlet (on it's own breaker) under my sink. But no matter how much trouble it was, I'm so so in love with it.(If you have much else on the same breaker, other reviews have said that it will trip your breaker easily. So if you can, you should have it on it's own breaker)I really love that you can adjust the temperature depending on what you're using it for. I keep mine on just over medium for washing dishes, and I can make tea without needing it any hotter.If you turn it all the way up it would be about boiling so you don't have to boil water in a pan honestly 🤗. So it does a good job.
G**N
It doing a good job.
Bought it for a friend.
K**V
Functions Well, But A Short Life
Why did you pick this product vs others?:I bought this in February 2023. It died in June 2025. I expected it to last longer than 2 years 4 months, but this is my first experience with an “instant hot” water heater. Through the time I had it, it functioned well and pretty much trouble free. I guess I had just taken it for granted it would always be there. All good things must come to an end. I’m trying a different brand to see if it lasts longer. Thanks for keeping me in hot water, Biselong….
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