---
product_id: 636162926
title: "Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 \"NPT Wall or Floor Mounted"
brand: "fisoceny"
price: "€ 304.31"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.nl/products/636162926-under-sink-instant-water-heaters-2-5-gallon-water-heater
store_origin: NL
region: Netherlands
---

# 1500W rapid heating Adjustable 86°F-149°F temp Easy plug & play install Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted

**Brand:** fisoceny
**Price:** € 304.31
**Availability:** ✅ In Stock

## Summary

> 🔥 Hot water, zero wait — your under-sink upgrade awaits! ⚡

## Quick Answers

- **What is this?** Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted by fisoceny
- **How much does it cost?** € 304.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/636162926-under-sink-instant-water-heaters-2-5-gallon-water-heater)

## Best For

- fisoceny enthusiasts

## Why This Product

- Trusted fisoceny brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Energy Smart & Eco-Friendly:** 90% thermal efficiency with fluorine-free insulation saves energy and cuts your utility bills.
- • **Instant Hot Water On Demand:** 6-minute rapid heating with 1500W power keeps your flow uninterrupted and efficient.
- • **Built-In Safety & Durability:** Pressure release valve, overheat protection, and leakproof stainless steel tank ensure peace of mind.
- • **Compact & Space-Savvy Design:** 2.5-gallon mini tank fits discreetly under sinks or counters, ideal for modern, clutter-free spaces.
- • **Precision Temperature Control:** Digital display plus mechanical knob lets you dial in the perfect 86°F to 149°F warmth every time.

## Overview

The Fisoceny 2.5 Gallon Under Sink Instant Water Heater delivers fast, energy-efficient hot water with a 1500W rapid heating element and precise temperature control from 86°F to 149°F. Its compact design fits easily under sinks or counters, perfect for kitchens, offices, RVs, and salons. Featuring a digital display, pressure release valve, overheat protection, and waterproof IPX4 rating, it combines safety, durability, and convenience in one sleek package.

## Description

Full description not available

## Features

- 【Upgrade 2.5 Gallon Water Heater】Fisoceny Under Sink Instant Water Heater Has Updated Its Digital Display,Independent Pressure Release Valve,And Fluorine-Free Polyurethane Foam.It Not Only Improves The Convenience Of Use,But Also Enhances The Safety Of The Water Heater,And Significantly Improves The Insulation Performance Of The Water Heater
- 【Adjustable Temperature&Digital Display】Our Under Sink Instant Water Heater Support Mechanical Knob Adjustment,Range From 86°F To 149°F Temperature Control,Combined With The Digital Display On The Panel,It Makes Temperature Adjustment More Convenient.It is an absolutely user-friendly mini tank water heater
- 【Easy To Install And Widely Use】Fisoceny 110V Water Heater Is Suitable For 1/2" NPT Water Hose Connection, Plug-In Connection With 3-Feet Power Cord For 110V/120V AC Power Supply Included,And Can Be Installed Easily.2.5 Gallon Water Heater With 11.4"L X 11.4"H X 11"W Compact Design,Saves More Space And Can Be Under Sink,Counter,Cabinet.Supporting Wall Or Floor-Mounted (Bracket Included).Can Be Widely Used In Kitchen,Offices,RVs,And Hair Salons.In addition, our 120v small water heater is IPX4 waterproof, so it is also ideal choice in the bathroom
- 【Energy Efficient&Perfect Insulation】FISOCENY 110V Instant Water Heater Have Excellent Energy Efficiency Level.Our Mini Tank Water Heater With Thermal Efficiency Up To 90%,Higher Energy Efficiency ,Providing On Demand Hot Water,6-Minute Rapid Heating,Instant Hot Water Is Always At Point Of Use.Polyurethane CFC-Free Filling Layer Ensure Excellent Insulation.Saving Energy And Your Bills
- 【Excellent Security&Durable】Fisoceny 110VSmall Water Heater Has Many Safety Designs.Integrated Welding Stainless Steel Tank,Leakproof Design,Insulation Foam,Overheat Protection,Pressure Relief Valve,LED display,effectively extending the service life of our 2.5 gallon water heater,making your user experience better.
- 【Note for Under Sink Water Heater】according to customer question based on images,it may cause water leakage if the pressure relief valve is installed on the red water outlet or not tightened,it is recommended that you install the pressure relief valve above the blue water inlet and tighten it.please inform us promptly if you have any questions or malfunctions,and we will provide you with thoughtful after-sales solutions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fisoceny |
| Product Dimensions | 11.4"W x 11.4"H |
| Special Feature | Easy to Install, LED Display, Overheat Protection, Pressure Release Valve, Waterproof |
| Color | Gray |
| Wattage | 1500 watts |
| Voltage | 110 Volts (AC) |
| Maximum Temperature | 149 Degrees Fahrenheit |
| Heat Output | 1.5E+3 Watts |
| Efficiency | 90% |
| Style | Under Sink Instant Hot Water Heater,Mini Tank Water Heater,2.5 Gallon Water Heater,110V Small Water Heater |
| Maximum Operating Pressure | 108 Pound per Square Inch |
| Mounting Type | Wall Mounted/Floor Mounted |
| Is Electric | Yes |
| Manufacturer | Fisoceny |
| Item Depth | 12 inches |
| Part Number | Fisoceny735 |
| Item Weight | 9 pounds |
| Item model number | Fisoceny735 |
| Shape | Square |
| Installation Method | Wall-Mounted |
| Special Features | Easy to Install, LED Display, Overheat Protection, Pressure Release Valve, Waterproof |
| Included Components | Female Water Pipe to Female Water Pipe x 2, Installation Bracket x 1, Pressure Release Valve x 1, Screws x 2, Under Sink Water Heater x 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Fisoceny
- **Product Dimensions:** 11.4"W x 11.4"H
- **Special Feature:** Easy to Install, LED Display, Overheat Protection, Pressure Release Valve, Waterproof
- **Color:** Gray
- **Wattage:** 1500 watts

## Images

![Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted - Image 1](https://m.media-amazon.com/images/I/51Y2WsygwmL.jpg)
![Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted - Image 2](https://m.media-amazon.com/images/I/71CjmO0mJzL.jpg)
![Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted - Image 3](https://m.media-amazon.com/images/I/71uVxwUFTJL.jpg)
![Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted - Image 4](https://m.media-amazon.com/images/I/71JGvVleueL.jpg)
![Under Sink Instant Water Heaters 2.5 Gallon Water Heater Mini Tank 110V,120V Digital Display RV Small Hot Water Heater with Release Vavle 1/2 "NPT Wall or Floor Mounted - Image 5](https://m.media-amazon.com/images/I/71K-WVpPgGL.jpg)

## Questions & Answers

**Q: Why does the under sink water heater leak during use？**
A: During the installation process, all screws of the hot water outlet, cold water inlet, and pressure relief valve must be tightened. Otherwise, water leakage during the heating may damage your floor or furniture.

**Q: What is the size of the water inlet of this 2-2.5 gallon mini tank water heater?**
A: The inlet and outlet of this water heater are 1/2 NPT.Considering the differences in the diameter of water pipes in different regions and occasions,we have included 2pcs famale to female converter pipes in the packaging.

**Q: Why does the hot water in the mini water heater flow out slowly?**
A: Firstly, it depends on the water pressure in your area.

**Q: How to avoid the under sink water heater leak?**
A: 1.All valves and nuts must be tightened to the maximum extent possible；

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great customer service
*by A***U on March 7, 2025*

I had issue with the pressure valve - water leakage even with tons of tape. Reached out to seller for a solution, seller quickly sent a replacement. Great service!Otherwise, the quality is good, function as advertised, value for money. The tank is a bit smaller than 2.5Gallon though so be aware.

### ⭐⭐⭐⭐⭐ Once you use these, you will NEVER have a Hot water tank again!
*by T***N on March 21, 2025*

I ordered this for the half bathroom in my husbands shop. It was super simple to install and installation of this unit took about 20 minutes to mount, hook up and get hot water running to the sink in the bathroom. Everything was already piped in and ready to go so installation was a breeze. There is no noise that is noticeable with this unit in the cabinet under the sink. It's built solid and functional for getting constant hot water flowing freely to a space where there is otherwise no hookup for a hot water source. We are very familiar with instant hot water systems as we have a whole house "hot water on demand" system in our home. It is something we would recommend for EVERYONE. Overall, this is a energy efficient, space saving system for anyone looking for an alternative to purchasing a big bulky hot water tank.

### ⭐ Multiple problems, eventually failed after 6 months.
*by L***R on June 3, 2025*

The inlet and outlet threads are too big, 1/2" not fittings are so loose i had to use a large amount of Teflon tape, and pipe dope, still had leaks and had to re- plumb it 3 times. After 6 months the tank failed and leaked, now I must purchase another unit. This was installed for one of my customers, and I lost at least 3 times the cost of the United on call-back labor time.

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**Shop now:** [https://www.desertcart.nl/products/636162926-under-sink-instant-water-heaters-2-5-gallon-water-heater](https://www.desertcart.nl/products/636162926-under-sink-instant-water-heaters-2-5-gallon-water-heater)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-22*