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Bosch

BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

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$225.99
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At a glance

Condition
New
Size
2.5 Gallon
Pattern
Water Heater
Model
ES 2.5-1M WIR S3100
Capacity
2.5 gal
Dimensions
13.75"W x 13.75"H
Weight
15.5 lb
In the box
Rough Plumbing;Parts and Repair;water-heaters

Features 6

  • CONVENIENT HOT WATER HEATER: 2.5 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 10.75 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)

Description

Get hot water where it's needed, when it's needed with the Bosch ES2.5 Tronic 3000 T Electric Water Heater. This 2.5-gallon capacity point-of-use mini-tank fits right under your sink and provides a practical and effective solution to your hot water needs. This smaller model can be plugged right into a 120-volt outlet with the 36-37" cord, or can be installed in-line with a larger hot water source to provide "on-demand" use. The glass-lined tank offers great insulation and added durability, while the heater's fast recovery rate eliminates long waits for hot water. An external dial allows you to easily control the temperature range, and the temperature-and-pressure relief valve enhances your safety. The ES2.5 Tronic 3000 T from Bosch has a sleek and attractive exterior design that blends in seamlessly with existing décor when installed in a visible location, making this heater a great option in any room. Troubleshoot: (1) Water does not get hot- Make sure the power supply is on and working If the indicator light works properly but temperature does not get hot at the tap, test for a plumbing crossover; shut off cold supply to heater and open hot water tap. There should be no water flowing. Any continued flow indicates a crossover which will effect the temperature and will need to be corrected Call a qualified service technician to test the resistance of the heating element (8-10 ohms). Heating element should be replaced if readings are outside these values (2) Leaking- Check water fittings and T & P fitting on top of tank Remove front cover and inspect heating element gasket If tank is leaking call Bosch Water Heating for warranty claim if still within warranty period Check anode rod. Other troubleshoot solutions are available on the installation manual Pg-11. Manufacturer Contact Information

Specs 29

Brand Bosch
Capacity 2.5 gallons
Power Source ac
Product Dimensions 13.75"W x 13.75"H
Special Feature Lightweight
Special Features Lightweight
Wattage 1440 watts
Voltage 120 Volts

Frequently asked questions

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Top Amazon Reviews

Great product Easy install
Size: 4 Gallon Pattern Name: Water Heater
Review Image by KGS KGS
Review Image by KGS KGS
Review Image by KGS KGS
Review Image by KGS KGS
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. ... show more
Reviewed in the United States on September 12, 2025 by KGS KGS
Instant hot water going on 5 years now
Size: 2.5 Gallon Pattern Name: Water Heater
Bought this 5 years ago and placed under sink in my outdoor kitchen. It has worked well providing hot water when needed. Generally I don't run out of hot water. If I use hot water for an extended period of time, it does not take long to heat up the next batch. Getting ready to purchase another for under the sink in inside kitchen. Hope I didn't jinx it but this has been a reliable HW heater. ... show more
Reviewed in the United States on November 10, 2025 by david covington
Great Improvement To My Kitchen. Just Be Sure To Check The Size
Size: 4 Gallon Pattern Name: Water Heater
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. ... show more
Reviewed in the United States on March 18, 2022 by CarefulPurchaser12
Happy but semi-disposable
Size: 2.5 Gallon Pattern Name: Water Heater
I have been through two of these. First one purchased in Feb 2023. Worked great until I noticed leak originating from seam in plastic cover. Technically the shell can be opened but dense foam filling exceeded my enthusiasm to pursue a repair. I bought a same model replacement mostly because I wanted the install to be a swap out/in affair. So as long as a two and a half year life seems reasonable to you, this unit is fine. Works great. Quiet, quick. Instant hot water in the kitchen has saved a ton of water previously waiting for heat to arrive. By the way, I live in Southern California known for hard water and I did no maintenance on my first unit. Your experience may be different. Despite all the above, just get one of these if you have areas with delayed hot water. You will be pleased daily. ... show more
Reviewed in the United States on October 23, 2025 by BGFallbrook
DO NOT WASTE PRECIOUS $$$ ON THIS OVERRATED HEATER WITH A DOCUMENTED HISTORY OF FAILURES
Size: 2.5 Gallon Pattern Name: Water Heater
BUYERS PLEASE BEWARE....NOTE there are several 1 star ratings please read all of them! I would give 'no stars' if that was available. THIS UNIT IS NOT VIABLE FOR LONG TERM USE AND UNSAFE REGARDING POTENTIAL WATER DAMAGE. SHAME SHAME SHAME ON AMAZON FOR RATING THIS AS ONE OF THEIR TOP CHOICES. Yours may last a long time....my first one failed in about 12 months and the replacement I paid for failed about 18 months later. I don't consider 12 months to maybe 2 years a quality product for something as simple as a hot water heater. Both units failed for the same issue, water leaked through the 6 year warrantied external tank. The tank gives NO warning of possible leaking/failure. This is not a safe unit in terms potential very high $$ water damage. Preventable if you install a separate overflow line draining into a separate drain or an automatic water shutoff with a leak detector installed.....all expensive and not mentioned or required by the manufacture . The unit should at least come with a drain pan under the unit and a built in drain line so you don't have to remove the entire unit from under a sink etc. I failed to catch those issues when I purchased my units. Next, consider the Warranty....or lack of warranty ....here's the catch...the fine print (literally fine print) for the BOSCH warranty DEMANDS that the user inspect and/or replace the sacrificial anode (if you don't know what that is DO NOT waste your time on this unit) every 12 months. If corroded, the anode must be ordered separately and then replaced.....NOT a simple task even for DIY folks. Replacement requires completely disconnecting all the water and electrical supply and then physically removing the unit, draining the unit (holding the 30+ lb unit upside down)in a shower, sink, bathtub etc because there is no drain line or plug built into the unit.....yet maintenance inspection is required every 12 months!! You CANNOT drain it in place from under a sink etc. Once drained next is opening the entire access ports to expose all of the electrical connections and finding the anode (You Tube time) then replacing the anode if corroded ....most likely it will be corroded. The 6 year warranty on the tank is VOID if the anode was not replaced, BOSCH requires pictures showing maintenance was done. The tank eventually leaks because the small anode is 'used up' and the tank begins to act as an external anode and starts to leak. This problem will be unknown until you have water all over your floor, water dripping through the ceiling below your floor etc. NO WARRANTY EXCEPTIONS from BOSCH who customer service was both extremely curt and uncaring. AGAIN I SAY TO POTENTIAL BUYERS....LOOK ELSEWHERE AND SAFE YOURSELF POTENTIAL LONG TERM TROUBLE. I also remain very disappointed in AMAZON for giving this such a high recommendation. ... show more
Reviewed in the United States on April 23, 2025 by J IN IRVING
Excellent
Size: 7 Gallon Pattern Name: Water Heater
Easy to install and works great
Reviewed in the United States on November 24, 2025 by Hetal patel
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