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Internet # 312273502

Model # ES85-15-G 480V

Store SKU # 1005227683

Heavy Duty 85 Gal. 480-Volt 15kW 3-Phase Commercial Electric Surface Thermostat Tank Water Heater

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  • For general commercial hot water applications
  • Can be used for point of use and booster applications
  • Backed by Rheem's 3 year limited warranty
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Product Details

About This Product

Rheem Commercial Heavy-Duty Electric Water Heaters are suitable for general commercial hot water applications and are also ideal for point-of-use installations. A single unit can be used as a booster heater to satisfy the hot water requirements of commercial dishwashers. A single temperature storage unit, when installed with a mixing valve, will supply two temperatures in food service establishments.


  • System sentinel diagnostics identifies a non-operating element
  • Long life tank design: proprietary steel formulation with high temperature porcelain enamel to maximize corrosion resistance resulting in a superior tank design
  • Minimum distance to combustibles is 0 in. from jacket and 18 in. from access door
  • Control box is located at the front of unit for easy wiring during installation with multiple knockout holes to accommodate a variety of conduit sizes
  • Factory wired 3-phase, approved for field conversion to single phase
  • Screw-in stainless steel elements that resist burn out and corrosion
  • Thick foam insulation for minimal standby heat loss
  • 2-anode rods are installed to ensure long life and corrosion resistance
  • Full port, full flow brass drain valve reduces time to drain and service tank
  • Factory installed temperature and pressure relief valve
  • Call 1-855-400-2552 before noon for same-day installation service in most areas, or visit our Water Heater Installation page for more information.
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 312273502

Model # ES85-15-G 480V

Store SKU # 1005227683


Dimensions: H 57.688 in, W 34 in, D 34 in




Product Depth (in.)

34 in

Product Height (in.)

57.688 in

Product Width (in.)

34 in

Tank Valve Size (in.)

0.75 in

Water Connection Size (in.)

1-1/2 in


Amperage (A)

18 A

Application Type


Electricity Phase


Finish Family


First Hour of Delivery (gallons/hr)


Fuel Type


Household Size




Maximum Temperature (F)

180 F

Minimum Temperature (F)

120 F

Nominal Tank Capacity (gallons)

85 gal

Number of Elements


Pack Size


Product Weight (lb.)

350 lb

Recovery Rate at 100F Rise (gallons/hour)


Required Volt Connection

480 volt



Tank Lining Material


Tank Warranty

3 Year

Uniform Energy Factor


Water Connection Location

Side, Top

Water Heater Features

Temperature Pressure Relief Valve

Water Heater Profile


Wattage (watts)

15000 W

Warranty / Certifications

Certifications and Listings

CSA Listed, UL Listed

Labor Warranty

No Warranty

Part Warranty

1 Year

Questions & Answers

Q:Is this water heater compatible with 480V power supply ?
by|Dec 21, 2023
1 Answer
Answer This Question

A:  Hi Jason and thank you for your question. Yes it is.

by|Dec 21, 2023
    Q:Can anybody tell me which anode rods this takes? I know it has 2, but I cannot tell which size to order.
    by|Oct 14, 2022
    2 Answers
    Answer This Question

    A:  I need to know which anode rod to replace, not the elements

    by|Oct 27, 2022

      A:  Hi Hugh and thank you for your question. The heater would have 9 -5KW elements in it.

      by|Oct 17, 2022
        Q:I need the ASME construction for model ES120A-54-G quantity 3 price and availability
        by|Jan 7, 2022
        1 Answer
        Answer This Question

        A:  Hi Chaas and thank you for your question. you would need to contact the outlet.

        by|Jan 7, 2022
          Q:Can I use it with 277v?
          by|Dec 29, 2021
          1 Answer
          Answer This Question

          A:  Hi Guillermo and thank you for your question. The options are: Voltages: 208, 240, or 480 VAC in either single phase or 3-phase; 277 VAC single phase 120 Volt Control Circuit – all units are furnished with a fused 120 volt control circuit. All controls (thermostats, high temperature limit, etc.) are operated off of this basic 120 volt control circuit. This circuit is created by an internal multi-tap transformer of unique design that has four (4) taps for the primary voltages, 208, 240, 277 and 480.

          by|Dec 29, 2021
            Showing 1-4 of 4

            Customer Reviews

            4.5 out of 5

            • 4.5 out of 4 reviews
            • 0% recommend this product
            Filter by:
            Showing 1-4 of 4 reviews
            • Verified Purchase
            • Verified Purchase
            Replaced a 22 year old AO Smith with this tank....
            Replaced a 22 year old AO Smith with this tank. This was better priced. The install went smooth. It has only been in a couple of weeks but it is working as expected. I did not give it 5 stars because it has not been in service long enough to determine reliability.
            • Verified Purchase
            Big recovery 74 gph, 18 kilowatts … it’s a beast!...
            Big recovery 74 gph, 18 kilowatts … it’s a beast! 480v 3 phase… runs on 22 amps
            • Verified Purchase
            1 found this review helpful
            Showing 1-4 of 4 reviews

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