Bosch Tronic 3000 T 4-Gallon Electric Mini-Tank Water Heater Review

Point-of-use water heating systems have become popular over the past few years.

This comes from the convenience they offer you when you wish to supply hot water to a distant fixture—whether it’s your office, kitchen, or bathroom—where laying long pipes from a centralized water heating system isn’t economical.

That said, Bosch is one of the top companies involved in the manufacture of these water systems.

And Bosch Tronic 3000 T 4-Gallon is one of their most popular point-of-use water heaters.

Below is our complete review explaining everything you need to know about this popular system before buying it.

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
  • CONVENIENT HOT WATER HEATER: 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 13.5 D Inches
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water


  • On-demand water heating
  • 6-year inner tank limited warranty
  • Sleek and attractive looks
  • Space-saving design
  • Quality, long-lasting design
  • 4-gallon water capacity


  • May leaking cases reported
  • Some people have issues with the temperature knob
  • No drain plug

Key Features and Benefits:

Enjoy HOT Water Whenever, Wherever You Need It

This water heater was specially designed to supply you with hot water at the point of usage. And truly, it executes its intended job pretty well.

You can place it right under your sink, powder room, basement wet bar, kitchenette, garage, small apartment, pool house patio sink, RV/boat, and everywhere else you need hot water on demand.

You can opt to install this water heater as a single water heating source, for solitary tank, as a supplement to your existing heating system located away from the sink, or even as a buffer set up in-line with your tankless water heater.

And unlike most of its rivals out there, this electric water heater offers you faster recovery rates, so you don’t have to wait for long hours to get hot water on your sink.

Keep in mind that this water heater also comes with pressure/temperature relief valve installed for your own safety.

Overall, this point-of-use water heating system will save you the time and money you might need to spend to plumb a warm water line to every sink in your home, office, business, etc.

Durable, long-lasting quality

Another reason you should invest in this point-of-use water heating system from Bosch is the simple fact that it’s made of quality materials.

The tank boats of glass lining which translates to exceptional durability as well as maximum insulation. What’s more, it features thick CFC-free foam insulation which promotes maximum energy efficiency.

If you’ve got your worries and fears about the quality of this tank, the manufacturer offers you a 6-year limited warranty on the tank alone plus 2-year limited warranty on all the other parts—giving you worry-free shopping experience.

Great for Small Spaces

You don’t have to fear about the Bosch Tronic 3000 T 4-Gallon Electric Mini-Tank Water Heater consuming too much space in your home or office.


That’s based on the fact that it comes with a compact design…its exact dimensions are: 13.75 x 13.75 x 13.50 inches.

Depending on your preferences, you can install it on the floor, shelf, or wall-mount it.

While still on it, it features a lightweight design (weighs 17.3 lbs. only) such that you can take it with you to any place or easily store it when not in use.

Super-duper Easy Installation!

Installing this mini water heater is doubtlessly the easiest part!

It comes with all the installation hardware included (braces) as well as easy to follow set up directions.

For this reason, you can do the installations on your own without necessarily hiring a professional plumber. In fact, many users have stated that they don't have any issues setting up the water heater at various points.

And as we have said above, you can choose to install it on your floor, shelf, or mount it on the wall. The choice is yours!

Once put in place, the sleek and attractive looks of this water heater will seamlessly blend with your existing décor, making the heater suitable for installation in any room.

NOTE: the mini water heater comes with a long 36-37" cord that plugs into the standard 120 electric outlets for independent installation.

Doesn’t this make the installation even easier?

Frequently Asked Questions:

1. What is the recovery rate for Bosch Tronic 3000 T 4-Gallon water heater?

Though the manufacturer does not specify the recovery rate of this water heater, they state that it’s quite faster to ensure you don’t wait for long hours to get hot water.

Many previous users have expressed their satisfaction with the heater’s recovery rate, especially those who use it as a booster water heater.

2. Will the water heater work for a shower?

This will probably depend on how much you spend in the shower. You can use this water heater for shower, but you should avoid taking those long, luxurious showers to avoid disappointments.

You can even use this trick to ensure it works for you throughout your shower duration:

Get wet, turn off the hot water, then soap up your body, and eventually turn on the water to rinse your body.

3. is this system expensive to run?

Definitely No! Remember that the system comes excellently insulated—with a thick glass lining as well as CFC-free thick foam—all of which will enable water to remain hot for longer. And this will save you a great deal of electricity.

4. Can you drain this heater when not in use to prevent freezing?

Sadly, the system doesn’t come with a drain plug to help you hassle-freely empty it when not in use or when you want to winterize it.

The manufacturer recommends siphoning as a way of draining it, though some users complain that it doesn’t work.

Final verdict

That’s everything you need to know about Bosch Tronic 3000 T 4-Gallon Electric Mini-Tank Water Heater before buying it.

From our detailed review above, we can safely conclude that the Bosch Tronic 3000 T 4-Gallon water heater is a reliable way of enjoying hot water whenever wherever you need it. You can install it in any place where running hot water lines will be impossible or inconvenient for you.

It has a space-saving and light design, it is easy and hassle-free to install, and will plug into the standard 120V electric outlets.

Given its sleek & stylish looks, you can install it in any room where it’ll blend with the existing décor.

The main issue with this tank is draining it when not in use, but I believe you can surely come up with a way of doing it.

In conclusion, we recommend you to invest in this mini-tank water heater as one of the most reliable point-of-use water heaters.

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