Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

So far it’s working great, I mounted it in the crawl space under the kitchen sink and put it inline with the hot water pipe that feeds the kitchen sink. No more wasting water during a long wait for the hot water to get there. I timed it and I’m now getting hot water in 6 seconds. This is the 4 gallon but the 2.5 would probably have been big enough. I added a PVC pipe to the release valve on top and a plastic tub underneath just in case the pressure valve ever does a release.

More than a year using this product and I am convinced that it is the best I have ever had. He has not given me any problems and my food. Trock is still running at 100%, it really is wonderful. I am loving him. Maybe it takes a long time to do this review. But believe me, this is the most real review you will find about this product.

This 4 gallon mini-tank heater is perfect for my kitchen. The total cost for the tank and the installation was about $325.00—higher in my case because the tank did not quite fit under the sink and I had to move it to a cabinet 6 feet away, on the other side of the dishwasher. This added the cost of two 6 foot hoses, two brass connectors, and a 12 guage extension cord. The normal cost would be under $300. I opted to abandon the hot water at the sink and run only cold water into the mini-tank. This way, running hot water in the sink never impacts my gas water heater. The downside is that I can run out of hot water at the sink, if I use too much at once, but the upside is that it saves a lot more energy and water. By turning up the temperature on the Bosch to ¾, I have eliminated the chance of running out for my own needs. My sink is located about 30 feet from my water heater, which is actually more like 40’ of piping. It was taking a good 30 seconds to get hot water every time, and I started collecting the 2 gallons of wasted cold water for my outdoor garden. Now the hot is basically instant. Because of the unusual 6’ distance, it takes one second to get hot water. If it were under the sink it would be quicker. Installation was quite easy. Even with this less desirable location, the hoses and extension cord passed easily behind the dishwasher. I did it myself, no plumber or electrician required. Why not get a demand water heater for the kitchen sink? Money. Any demand water heater you buy will require a new, dedicated electrical line with a dedicated breaker. This will easily cost you $1500 or more for the electrician to install it. A demand water heater retrofit really only makes sense if you are replacing your main water heater, and in my case, I would STILL want my mini-tank, because the distance problem would not be solved. It would make some sense to have a demand water heater installed at the sink for NEW HOME construction, but the retrofit is far too expensive to justify. Now that I have converted my sink hot water usage from gas to electric, I can start working on converting to solar. Get this mini-tank. It will save you water and energy, even if you connect it to the hot water line. What you will need for a standard, under-the-sink installation: 2 ½”npt to 3/8” compression hoses, 2’ long 1 3/8” compression tee 1 3/8” female to female connector (male on both ends) Aluminum water heater pan You will use the connector to connect the 2’long 3/8” hose to the hot water hose for the sink tap. For my installation, I used the following: 2 ½” npt to 3/8” compression hoses, 1’ long 2 3/8” dishwasher supply hoses, 6’ long 3 3/8” female to female connectors, two to connect the 1’ hoses to the 6’ hoses, 1 3/8” compression tee 1 12 gauge extension cord, 8’ long Aluminum water heater pan Depending on your kitchen and location, you may want to plumb a PVC pipe into the over-pressure valve and either to a floor drain or to the outside. My kitchen has waterproof tile floors, so I can take a chance on an overflow filling the drain pan and spilling out onto the kitchen floor. I can just mop it up. I connected the 6’ DW supply hoses to the 1’ hoses. It was the easiest way to get the long 3/8” compression hoses to connect to the ½” npt connections at the water heater. Oh also, you need a good flashlight or headlamp, and a couple of pairs of adjustable spanners (small crescent wrenches). Note: Technically, you will need an electrician to install the 7 gallon version, but it does not require a new or dedicated circuit, as it still only pulls 12 amps. If you are comfortable connecting the electrical line into your existing box, you will be OK. Add a little cost for connectors or possibly a larger electrical box. In some municipalities, you may need a permit and inspection because this may qualify as adding an electrical circuit. The 7 gallon would be nice, but it also takes longer for the tank to heat and takes up more room. All good products though. I updated this on 3/19/2022 to correct some typos.

This is the first time that I have ever reviewed a product, good or bad. However I feel I need to. Do NOT buy this product. I did and less than 12 months in use the tank leaked during the night. No small leak either, I was in kitchen about 1:30 am no leaking and by 6 am water all over floor with seepage through basement ceiling. Messy and costly clean up. Unit was recommended by contractor as he had installed in his home and others in years past with no faulty issues. Mine was installed in late June 2023. It worked well initially and I was thrilled. Determined leak from tank itself not at any connections points. Unit has 8 year tank leakage warranty. Note reviews have been more negative since the fall of 2023. Question if Bosch had quality control change in past couple years. Label with serial number notes being made in China now. Correlation ??? I contacted Bosch per warranty and told to have contractor contact their tech support. He did and was given instructions to take apart, photos etc. routine needed to have Bosch decide IF qualified for warranty replacement coverage. Contractor asked Bosch tech about noted history of water leakage issues in the recent year and tech was totally SILENT. Contractor asked if he was still on phone and tech did then respond he was but would not address leakage problems. This makes me suspect Bosch is aware of problem. I told contractor not to bother with trying to obtain replacement as I am NOT interested in dealing with water all over again. However I did not expect partial cash refund do to earlier responses from Bosch's customer service but I called again and asked if they had partial cash refund option. Wasn't surprised that they didn't but it DID surprise me that I was told to have contractor call Amazon and seek refund from them. WHY?? Decided to play the game and I shared experience with Amazon's customer service assistant, no surprise, no partial refund there either. Point made. Amazon is aware of issue in selling this product..if they choose to continue to....BUYER BE WARE.. YOU ARE WAISTING YOUR MONEY AND RISK ADDITIONAL EXPENSE IN WATER DAMAGE REPAIRS. Good luck.

I have bought 3 of these over the years for underneath our kitchen sink, which is far from the house water heater. It's so awesome to have instant hot water instead of hot water in 3 minutes. It is fairly easy to install if you know a little bit about plumbing. You'll have to get a couple of extra water lines and connectors from your hardware store. All of that said, they ONLY LAST ABOUT 3 YEARS. That even includes replacing the anode rod. I also highly recommend putting the unit in a big tray of some sort to catch overflow as well as a water detector in the tray, because if the unit starts to leak or overflow, you want to know immediately and not after water is all over your floors.

We purchased this to replace our propane water heater in our travel trailer and it was definitely worth it! It does not take very long to heat up. The manual said approx. an hour but it was much faster than that and it also holds the heat for quite some time. We tend to turn it on when we are about to use it and shut it off when we are done but the water will stay hot for a couple hours after it’s been heated. Very impressed to say the least. Hubby was impressed with how easy it was to install as well.

My wife and I moved into a new house where the kitchen sink is as far removed from the hot water heater as is physically possible. It took about 2 minutes for hot water to arrive from the 70 ft distance. Since the water lines run in a concrete slab, even after hot water arrived, a slight pause in flow had a great cooling effect. This water heater tank arrived yesterday in the afternoon and we had hot water at the sink before dinner. Plumbing install was a breeze with the PEX lines. The time consuming portion was installing a new receptacle under the sink. With only a day or so of operation, we are ecstatic. Hot water flows within seconds as the attached video shows. I have a reminder to check the anode after 6 months to see how much erosion occurs. Just waiting for an inline valve to arrive and install as per recommended instructions. Shut off valve added and everything is still good. We love this addition to our life.

Sin problemas de instalación y funcion muy bien en la estética de mi esposa donde se instaló. Da el agua caliente a gran velocidad.

We have a two-piece bathroom that seemed to take forever to get hot water. I installed this under the sink in-line with the hot water line. I chose Bosch because it has been a reliable brand. There needs to be an outlet within two feet of the tank and it should be dedicated and with a GFCI. The tank supplies plenty of immediate hot water for handwashing. I am now looking into the feasibility of installing one for the shower upstairs.

Read a bunch of reviews on different brands and this one seemed the best for our tiny home. It fits below our bathroom cabinet (which was a must) and runs hot water to the kitchen and bathroom. We're able to take a hot shower with it, and have quite hot dish water. Its been 6 months and its still running smoothly. Very pleased with how quiet and how compact it is, considering what it does.