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ThermoMate Tank Water Heater Electric, 8 Gallon Small Point of Use Residential Hot Water Heater, 1500W 120Volt Compact, Adjustable Thermostat, UL Listed (ES900)

  • Based on 339 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Aug 10
Order within 14 hours and 37 minutes
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Style: 8 Gallons


Features

  • 8 Gallons point of use provide enough hot water for sink washing, dishwasher, washing machine or 8 - 12mins quick shower. Factory set temperature to 125F. It can be adjusted between 90F and 150F through built-in thermostat
  • 20.75-inch low profile compact small water heater (120 Volt Hard Wired), independent installation or as booster in-line with a large hot water source, ideal for kitchen & bathroom sink, RV & boat, vacation cabin & camper, garage & barn, shop & salon
  • 1500W INCOLOY-800 heating element - better corrosion resistance performance and more efficient than copper at higher temperature, thus has a longer life span and energy saving
  • Corrosion Resistant Tank Inner tank was coated with porcelain enamel glass, which has better performance in resistant to high temperature and rust, reducing leaking chance, thus ensuring a long life service and low maintenance
  • UL Listed safety including ASME, ANSI and CSA (AGA) approved T&P relief valve, independent drain port, high temperature limit protection and adjustable thermostat
  • Peace of Mind - Water connection: 3/4" NPT; Electrical requirements: 1500W at 120 Volts (AC); Recommended circuit breaker: 15AMP;Maximum water pressure: 150 PSI.

Brand: thermomate


Capacity: 8 Gallons


Power Source: ac


Product Dimensions: 14"W x 21"H


Special Feature: UL Certified, Metal housing, Corrosion resistant tank, INCOLOY 800 stainless steel heating element


Power Source: ac


Special Features: UL Certified, Metal housing, Corrosion resistant tank, INCOLOY 800 stainless steel heating element


Wattage: 1500 watts


Voltage: 120 Volts (AC)


Maximum Temperature: 150 Degrees Fahrenheit


Heat Output: 5120 British Thermal Units


Maximum Pressure: 150 Pound per Square Inch


Mount Type: Floor


Is Electric: Yes


Smart Home Compatibility: Not Smart Home Compatible


Color: White


Style Name: 8 Gallons


Material Type: Glass, Incoloy-800


Brand Name: thermomate


Model Number: ES900


Manufacturer: thermomate


UPC: 850073127377


Manufacture Year: 2025


Included Components: Water Heater x1, T&P Relief Valve x1, Dedicated Plug x1


Capacity: 8 Gallons


Item Dimensions W x H: 14"W x 21"H


Item Weight: 34 Pounds


Item Depth: 20.75inch


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews


  • HOT WATER - FAST!
Style: 1.32 Gallons
Great Produce, easy to install, gives immediate hot water - one of the best installs I've done. I no longer have to wait for hot water. 1.5gal is very small and the hot water does not last but a minute (depending on GPR of your home water). I move the 1.5 gal to the bathroom and installed a 2.5 gal in the kitchen - works great! ... show more
Reviewed in the United States on April 20, 2026 by Amazon Customer

  • Wow this works well and easy to set up. Great backup for hot water.
Style: 1.32 Gallons
Wow this works well and easy to set up. Great backup for hot water.
Reviewed in the United States on June 8, 2026 by A.J. Vera

  • Ok but not perfect.
Style: 1.32 Gallons
Bought the 1.3 gal as a preheater for a kitchen faucet that has a long pipe run to the house water heater. It works ok for this purpose but as many other people have said, the temperature is not consistent. This may be due to water stratification or a cheap temperature sensor. Don't know but it's bad enough that you don't want to use it for a shower. The water temp just varies too much. I also plan to remove and clean the unit every year and clean/check the replaceable anode rod. Last thing I need is for this thing to leak water on the kitchen floor. ... show more
Reviewed in the United States on April 13, 2026 by PKN

  • Works great. I added a switch.
Style: 2.5 Gallons
This is quick to heat water and it stays warm in the tank for a surprisingly long time. Easy to install, at least for me (under the kitchen sink). I plugged this into the same under-sink electrical outlet that powers my dishwasher and disposer. To prevent an electrical overload and operate the water heater only when needed (and NOT when operating those other items) I added an "Ortis Router Table Switch with Large Stop Sign Paddle" just inside the sink cabinet. I only need to tap the paddle with my foot in order to cut power to the water heater. This item is also on Amazon and works great. ... show more
Reviewed in the United States on January 5, 2026 by D OC

  • easy to install
Style: 1.32 Gallons
All the way we should had a temperature read out it is easy to install very dependable and does its job for the capacity that it has I would definitely buy this again
Reviewed in the United States on June 7, 2026 by john Mcfeely

  • Outstanding Quality
Style: 18 Gallon
Simply outstanding quality !
Reviewed in the United States on May 25, 2026 by Robert Smith

  • Looks well made but not sure yet!
Style: 2.5 Gallons
Not sure if I installed it correctly. Constantly needed to reseat the high pressure valve, finally got it done. Not much hot water like in the old electric heaters had the lower element not kicking on. When the light goes off it should be as hot as it gets, but I only get maybe a quart of hot water. I’m still going to work with it, and repost if it fully heats. ... show more
Reviewed in the United States on April 15, 2026 by Railingman

  • Instant hot water when its needed
Style: 2.5 Gallons
Perfect for any outdoor cook space where there is only cold water. Fits under any faucet. Small size but it holds plenty of hot water
Reviewed in the United States on April 1, 2026 by Jesse

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