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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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Price:
$54585

Product Overview

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.
  • 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
  • California residents

Info & Guides

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BrandBoschBoschBosch
Name2.5 Gal. Electric Point-of-Use Water Heater (3-Pack)4 Gal. Mini-Tank Electric Water Heater (3-Pack)7 Gal. Electric Point-of-Use Water Heater (3-Pack)
Price
$43566
$54585
$66550
Ratings
(874)
(517)
(177)
Efficiency LevelSuper HighSuper HighSuper High
Water Heater FeaturesOverheat Protection,Temperature Pressure Relief Valve,Wall MountedOverheat Protection,Temperature Pressure Relief Valve,Wall MountedOverheat Protection,Temperature Pressure Relief Valve,Wall Mounted
Nominal Tank Capacity (gallons)247
Water Heater ProfileCompactCompactCompact
Fuel TypeElectricElectricElectric
Application TypePoint of UsePoint of UsePoint of Use
Wattage (watts)144014401440
View ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
13.5
Product Height (in.)
13.75
Product Width (in.)
13.75
Tank Valve Size (in.)
0.5
Water Connection Size (in.)
.5

Details

Amperage (amps)
12
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
Minimum Temperature (F)
65
Nominal Tank Capacity (gallons)
4
Pack Size
3
Product Weight (lb.)
17.3
Rated Tank Capacity (gallons)
4
Required Volt Connection
120 volt
Returnable
90-Day
Tank Lining Material
Glass
Tank Warranty
6 Year
Uniform Energy Factor
0.98
Water Heater Features
Overheat Protection,Temperature Pressure Relief Valve,Wall Mounted
Water Heater Profile
Compact
Wattage (watts)
1440

Warranty / Certifications

Certifications and Listings
CSA Listed,UL Listed
Labor Warranty
No Warranty
Part Warranty
2 Year

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.5
    out of 517 reviews
  • 88% recommend this product
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Showing 1-30 of 517 reviews
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
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
    19 people found this 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
    18 people found this 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
    3 people found this 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
      3 people found this 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
      1 person found this helpful
      Mounted in line with hot water supply. We now have hot water almost as soon as the tap is opened....
      Mounted in line with hot water supply. We now have hot water almost as soon as the tap is opened. If you have flexible sink connections from shut off valves, it's a fairly easy install for the experienced DIY. It takes up a lot of room under the sink so measure twice before you buy. Keep in mind the pressure relief valve requires a place to discharge!
      by
      • Verified Purchase
      • Recommended
      5 people found this helpful
      The usual use for this mini-tank water heater is to use at a sink or bathroom located far from th...
      The usual use for this mini-tank water heater is to use at a sink or bathroom located far from the house water heater so there will be hot water right at the tap. I have put it to a different use. I've installed a high efficiency heat pump water heater to supply heat to our house in-floor hydronic heating system. The heat pump system is heat pump only, not hybrid with electric resistance heating back-up. Since the heat pump system maximum capacity is very close to the calculated design day heat loss from the house I wanted to add a little bit of electric resistance heating into the tempered water that flows to the floors. The tempering valve is set to about 100 to 105 degrees fahrenheit and the heat pump system is able to produce water that maintains that temp most of the time. I added the mini-tank heat in the line that distributes water to the floors add I'll set the temp at about 80 degrees just to be sure there is a way to add some heat if the heat pump isn't quite producing enough heat. I'm still setting it up and we haven't had very low outside temps yet so I'll have to wait to see how well it performs. I really appreciate that this water heater can be set as low as 65 degrees, so 80 degrees will fall right into it's operational range. The attached photo shows the tank installed during leakage checking and before the pipe insulation and temp setting happened.
      by
      • DIY
      • Verified Purchase
      • Recommended
      1 person found this helpful
      Its great easy to instal space saver very eficient
      Its great easy to instal space saver very eficient
      by
      • Verified Purchase
      • Recommended
      It gets the water hot
      It gets the water hot
      by
      • Verified Purchase
      • Recommended
      1 person found this helpful
      Don't buy this unit. In less than 6 months, we started getting small bits of debris that looked l...
      Don't buy this unit. In less than 6 months, we started getting small bits of debris that looked like grey sand in the hot water. Bosch said it was probably the anode creating the debris. Even though the unit was not very old, the anode is considered sacrificial and I could buy a replacement. I complained loudly that the unit had a year warranty on parts. To their credit at least they sent me another anode for free. I opened it up and found the original anode in terrible shape. see picture. Bosch's answer to this was to tell me" there is something going on there for sure". So much for technical support.
      by
        12 people found this helpful
        This is a good item easy to install and work great under counter
        This is a good item easy to install and work great under counter
        by
        • Verified Purchase
        • Recommended
        Great price, easy to install and it gives us all the hot water we need.
        Great price, easy to install and it gives us all the hot water we need.
        by
        • Verified Purchase
        • Recommended
        Finally hot water in at our kitchen sink... we love this water heater! We have always had an is...
        Finally hot water in at our kitchen sink... we love this water heater! We have always had an issue getting hot water to our kitchen sink...warm water at best. When we remodeled our kitchen I took the opportunity to add this 4 gallon heater under our sink. It is amazing we have hot water immediately and 4 gallons is perfect for washing dishes and standard use. We hooked it to our hot water line from the wall. We were seeing an issue with some leakage from the top valve at first (took me a while to figure out where the water was coming from as it seemed to leak over night probably when pressure built up). We remedied it by buying a 3/4 inch connector, hose, and pvc pipe connector and connecting it to the drain pipe just in case it gets too hot or pressure builds up. This is defiantly needed because we did have water that was released from the valve occasionally (see pictures for our solution). We also cut into the side cabinet wall to use the space between our sink cabinet and dishwasher cabinet (about 8") which helped to conserve space under our sink and make it possible to fit this heater under our sink (worth considering if you have space between cabinets in your kitchen).
        by
        • Verified Purchase
        • Recommended
        16 people found this helpful
        We’ve bought 2, one for our travel trailer when the...
        We’ve bought 2, one for our travel trailer when the old one went out, it’s perfect
        by
          Put 2 of these units in they both stated...
          Put 2 of these units in they both stated leaking at the 3 year mark. Depot wouldn't do anything for me, and Bosch hasn't gotten back to me. Junk units.
          by
          Response from Bosch ThermotechnologySep 21, 2021
          Hello Jona and thank you for your feedback. We are very sorry to hear that you have had trouble with your model ES4 water heaters 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. Please call 800-283-3787 and a member of our team will gladly speak with you.
            by
              by
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                  by
                  • Verified Purchase
                  terrible product
                  It is WONDERFUL to have hot water right when you want it, but at what cost? Bosch uses a steel tank, and then screws in a bronze pressure valve - causing dissimilar metal corrosion. The steel tank gets eaten away. Mine leaked after 9 months, flooding my bathroom and destroying my cabinet. The anode that is supposed to stop this dies in 6 months or so. Ongoing maintenance is required to keep it working. Every 6 months (with my water) you have to drain the water out of the unit and take the tank apart to get to the anode inside to replace it and scrape the heating element. Not like the standard water heaters that we install and forget until they fail in 20 years or so. The thermostat does not do a good job either. My water temperature varies from barely warm to scalding. I have replaced the thermostat twice, and still I never know what temperature the water will be. I fear that all of the glowing reviewers have yet to experience the true nature of this unit - but they will.
                  by
                  Response from Bosch ThermotechnologyJul 21, 2021
                  Hello and thank you for your feedback. The rare occurrence of an anode rod failing in a short time is often associated with the local water supply. We are very sorry to hear that you have had trouble with getting this unit to work properly 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. Please call 800-283-3787 and a member of our team will gladly speak with you.
                    Perfect for a small under the sink water heater. I...
                    Perfect for a small under the sink water heater. I got this after purchasing a tankless water heater. The water is actually hot. Just as described!
                    by
                    • Verified Purchase
                    by
                    • Verified Purchase
                    It works extremely well and was easy to install....
                    It works extremely well and was easy to install.
                    by
                    • Verified Purchase
                    Great value,easy installation,excellent instructions....
                    Great value,easy installation,excellent instructions.
                    by
                    • Verified Purchase
                    Rating provided by a verified purchaser...
                    Rating provided by a verified purchaser
                    by
                    • Verified Purchase
                    by
                    • Verified Purchase
                    • Recommended
                    This was a great solution for us having long wait for hot water due to the distance from our on d...
                    This was a great solution for us having long wait for hot water due to the distance from our on demand hot water heater. It has been installed for about 2 months with no issues. We installed it in our hot water line to eliminate the waste of water. It was easy to install. My only issue was the short length of the power cord. We love the short wait for hot water.
                    by
                    • DIY
                    • Verified Purchase
                    • Recommended
                    It works as great. I bought it for my man...
                    It works as great. I bought it for my man cave. I got a couple sinks that I wanted hit water for. Very simple to install just make sure you have an outlet close by preferably a gfi outlet.
                    by
                    • Verified Purchase
                    After needing several adapters to hook up it was installed...
                    After needing several adapters to hook up it was installed and works really well
                    by
                    • Verified Purchase
                    Showing 1-30 of 517 reviews