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4 Gal. Mini-Tank Electric Water Heater (3-Pack)

Includes 3 units ($181.95 /unit)
$545.85
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  • Floor or wall-mountable, perfect for under sink placement
  • Plugs into 120V outlet, 6-Year warranty on glass lined tank
  • Same-day installation in most areas. Call 1-855-400-2552 by noon
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Return this item within 90 days of purchase. Read Return Policy

Product Details

About This Product

The Bosch 4 Gal. Electric Water Heater has a 4 Gal. mini-tank that fits under your sink to provide hot water right where you need it. The heater plugs right into a 120-Volt outlet and has a lightweight, compact design that's easy to handle and install. A glass-lined tank offers great insulation, while the heater's fast recovery rate eliminates long waits for hot water. A temperature-and-pressure relief valve enhances your safety.

Highlights

  • 4 Gal. mini-tank fits under your sink to provide hot water right where you need it
  • Electric water heater is easy to maintain
  • Fast recovery rate eliminates long waits for hot water
  • 2-year warranty on the parts, 6-years on the tank
  • 98% thermal efficiency
  • Glass-lined tank offers great insulation
  • Plugs into a 120-Volt outlet
  • Installs independently or in-line with a large hot water source
  • Can be mounted on a wall
  • Temperature pressure relief valve
  • Return policy: 90 days
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 313409708

Model # 8733954924

Specifications

Dimensions: H 13.75 in, W 13.75 in, D 13.5 in

Dimensions

Product Depth (in.)

13.5 in

Product Height (in.)

13.75 in

Product Width (in.)

13.75 in

Tank Valve Size (in.)

.75 in

Water Connection Size (in.)

1/2 in

Details

Amperage (A)

12 A

Application Type

Point of Use

Efficiency Level

Super High

Finish Family

White

Fuel Type

Electric

Household Size

1-2

Indoor/Outdoor

Indoor

Maximum Temperature (F)

145 F

Minimum Temperature (F)

65 F

Nominal Tank Capacity (gallons)

4 gal

Pack Size

3

Product Weight (lb.)

17.3 lb

Rated Tank Capacity (gallons)

4 gal

Required Volt Connection

120 volt

Returnable

90-Day

Tank Lining Material

Glass

Tank Warranty

6 Year

Uniform Energy Factor

0.98

Water Heater Features

Glass-Lined Tank, Overheat Protection, Temperature Pressure Relief Valve, Wall Mounted

Water Heater Profile

Compact

Wattage (watts)

1440 W

Warranty / Certifications

Certifications and Listings

CSA Listed, UL Listed

Labor Warranty

No Warranty

Part Warranty

2 Year

Questions & Answers

129Questions
caret
Q:I’m building a new log cabin. I will have 2 full bathrooms and a dishwasher. Only 2 people and we will never run the dishwasher while showering. Will this unit cover that load?
by|May 19, 2024
1 Answer
Answer This Question

A:  Tracy, This 4 gal unit is not your best choice for your needs. Please investigate our model ES8 with over 7 gal of water. Even at 7+ gallons, your usage and expectations will need to be mitigated. 1) The dishwasher may not require incoming Hot water (check the dishwasher's manual). Dishwashers have their own heating element but some models still have manuals that state the need to supply Hot water (this is often to meet the energy efficiency tests for the dishwasher). 2) With just over 7 gal of water, your Hot Water shower time will be much less than what you experience with a 50+ gal water heater. The duration will vary depending on the shower's flow rate, the temperature you set on the unit, and the incoming ground water temperature. 3) The model ES8 may take up to 45 min. to heat another new full reservoir of water (your unit settings and incoming ground water temps will dictate the time). This means that your showers may need to be spaced 45 minutes apart. 4) Often times, a log cabin is supplied by well water. Unless the cabin is within about 60 miles of the gulf coast, your ground water from a well is going to be very cold and that will impact how quickly the unit is able to heat a new fresh reservoir.

by|May 20, 2024
    caret
    Q:Are the inlet and outlet threads made of metal or plastic?
    by|Feb 10, 2024
    1 Answer
    Answer This Question

    A:  Woodchuck, All Bosch mini-tanks use metal threaded connectors.

    by|Feb 10, 2024
      caret
      Q:Does it have to be plugged into its own outlet
      by|Dec 30, 2023
      1 Answer
      Answer This Question

      A:  Brewmel, The concern is that when the heating element is fully engaged on a circuit that may have other high draw electrical loads running simultaneously; the combined amperage may trip the circuit breaker. The most common occurrence is when this unit is added to the same circuit as a dishwasher; as dishwashers often have a high amperage draw heating element. We suggest adding up the potential simultaneous amperage loads on the circuit you wish to add this item to, so as to ensure it will not exceed the circuit's rating.

      by|Jan 22, 2024
        1 found this answer helpful
        caret
        Q:Can I use this water heater to heat the water in my bathroom shower hose? It takes forever for my bathroom water to heat up due to distance from water heater, so I?ll hoping this would help. Please advise if this could help.
        by|Sep 23, 2023
        1 Answer
        Answer This Question

        A:  Jana81, Yes, this is a common application for the Bosch min-tank products. We refer to it as a Booster application. In this application you will run your Hot line from your primary heater into this unit's Cold intake. The shower will pull from this unit's Hot out line. Having this unit close to the shower will significantly reduce the wait time for hot water.

        by|Oct 25, 2023
          2 found this answer helpful
          Showing 1-4 of 129

          Customer Reviews

          4.5 out of 5

          • 4.5 out of 667 reviews
          • 83% recommend this product
          Filter by:
          Showing 1-10 of 667 reviews
          It’s already leaking :(
          by
          Response from Bosch ThermotechnologyApr 1, 2024
          Hello Kristi and thank you for your feedback. We are very sorry to hear that you have had trouble with your model ES4 water heater and for the inconvenience caused. If you are willing, we would like to have a member of our team speak with you to discuss your experience and provide additional feedback. Your unit may be under warranty. Please call 800-283-3787 and a member of our team will gladly speak with you.
          • Verified Purchase
          Less than two year life cycle.
          Rusted out and leaks at month 21. No factory warrantee. 90 days at Home Depot.
          by
            1 found this review helpful
            The water heater works great and the wife Loves it
            by
              It only works 2 years…
              This will be my 3 replacement, due to the water heater leaking and then basically exploding on the inside of the unit. Damaging it beyond repair. Our floor was flooded, because it happened with we weren’t there. 2 -3 years of usage….but has 6 years of warranty on it that won’t help you when it malfunctions. Sad.
              by
                3 found this review helpful
                Easy to install and works great. I actually installed...
                Easy to install and works great. I actually installed it in the crawl space directly under the kitchen sink. To facilitate servicing the unit and as a proactive way to bypass the unit in the event it fails, I installed valves on the in and out connections and a third valve to pass the master water heater water to the sink. Also have a slip connection on the relief valve pipe for removal.
                by
                • Verified Purchase
                3 found this review helpful
                Junky product with a bad warranty
                Most of the good reviews here were probably written too soon after purchase to really test this product. I purchased one of these and 2 years later it completely failed. It leaked inside the case, shorted the wiring and can not be repaired. I sent pictures of the unit to Bosch and they denied responsibility for the failure, claiming that I should have taken it apart every year and replaced all the parts that were failing. Which other company forces customers to disassemble appliances and do invasive maintenance themselves under threat of voiding the warranty if they don't? Most companies void the warranty if you open their appliances and have all sorts of warning stickers cautioning customers from opening their products. This is a junk product with a name brand on it that deceives people into thinking it's good. If you buy this product, make sure to plug it into some sort of protected outlet or cord with fuses or breakers and you should consider buying a 5 year warranty as you will probably need it.
                by
                  36 found this review helpful
                  Bosch 4 Gallon Heater Works, But You Have TO Do the Maintenance!
                  I bought the water heater about two and a half years ago. Worked fine for about a year and 8 months, then started to leak early in the morning and damaged my wood floor. I took it back since it had a 6 year warranty, but I had to contact Bosch to get a replacement. Bosch stated that they would not replace it unless I could prove that the anode was still good. I took it apart and low and behold, the anode was completely used up. This being the case, the 6 year warranty was void since I did not change out the anode. However, Bosch did send me a new (discounted) one for $130. Bosch also told me that in some cases the anode can go bad in as little as six months if you have corrosive water. Well, I replaced the old water heater with the new one and made a note to check the anode at about 1 year; however, I decided that I better check it at the 8th month. I did, and found that the anode was also gone after only 8 months! Now I will start replacing it at 6 months since it appears that I have highly corrosive water. Lesson leaned is to change out the anode every 6 months not at 1 year as Bosch recommends. Also, changing out the anode (about $18) is time consuming since I have to drain it via a syphon and you have to clean out the tank because spent anode sits on the bottom. It is a good tank, but you must check the anode at least every six months to make sure the anode is OK, if you are not sure what the corrosivity of your water is. I assume this would be the case what ever brand heater you use.
                  by
                  • DIY
                  • Recommended
                  24 found this review helpful
                  Very happy with this solution for my RV problem. I have an older RV we live in and don't travel ...
                  Very happy with this solution for my RV problem. I have an older RV we live in and don't travel with. The original water heater finally gave out with multiple corrosion holes. The cavity left by the 10 gal. gas/electric Atwood heater was large enough to accommodate this heater neatly. The height is a close call as the dimensions do not include the height of the relief valve on top. I called Bosch and spoke to an engineer that told me the valve is about 3 inches tall so that it was just short enough to fit. My own area had some extra height so the fit was good. I had to order some pex fittings to go from 1/2" pex to 1/2" mpt plus some braided hoses. I then cut out the existing RV valve setup and connected the heater up. I plugged it in and was good to go. I was not sure the heater came on at first as the mounting had bright sunlight and the on light was too dime to see at first. I shaded the light with my hand and was then able to see it was lit. This would not be an issue with a normal indoor installation. I then bought a scroll saw from Home Depot and a 32tpi metal blade and cut the outer door panel off of the "dead" old heater and installed it back on the RV for a clean finish to the installation. From the outside you would never know of the surgery. Although it is only 4 gallons I have not run out of hot water with back to back showers or dishes. I set the temperature to halfway between normal and max and with the lower flow rate of the RV we just use more cold water to adjust the temperature and all is well. This was a great solution and saved me over $500 compared to a replacement RV heater. This heater also appears to better insulated as well with foamed in place insulation like a picnic cooler.
                  by
                  • Verified Purchase
                  • Recommended
                  4 found this review helpful
                  I was shipped a RETURNED item, not happy. I am returning this and ordering another one - hopefull...
                  I was shipped a RETURNED item, not happy. I am returning this and ordering another one - hopefully it is NEW, unopened, unused, un-returned. I noticed the box had been re-stapled before I opened it. Also checked the bottom and it was re-stapled. I opened the box and both pieces of styrofoam shipping were stack on top of each other instead of one on bottom one on top. Also, the user manual was crumpled - shoved back in there. Also a cap on one of the nipples wasn't screwed on straight - easy to tell the item had been opened. I didn't even take it out of the box. Taking it back to store, ordered another online. I don't want a returned item - not trusting of what problem(s) the other person had.
                  by
                    5 found this review helpful
                    Great product for under sink - instant hot water - vs waiting for the water from the other side o...
                    Great product for under sink - instant hot water - vs waiting for the water from the other side of the house. Installed in the supply for the sink faucet and the dishwasher.
                    by
                    • Verified Purchase
                    • Recommended
                    2 found this review helpful
                    Showing 1-10 of 667 reviews

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                    Water Heater Profile

                    Compact

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                    Compact

                    Compact

                    Water Heater Features

                    Glass-Lined Tank, Overheat Protection, Temperature Pressure Relief Valve, Wall Mounted

                    No Additional Features

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                    Efficiency Level

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                    Nominal Tank Capacity (gallons)

                    4 gal

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                    Fuel Type

                    Electric

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