Bosch ES4 Point-of-Use Mini-Tank Water Heater 4 Gal
- 4 gallon glass-lined tank
- 120VAC plug-in, 1440 W
- Wall or floor mount, bracket included
- Temperature and pressure relief valve
- 7.8 kg
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A plug-in mini tank that puts hot water right at a sink, or ends the wait when fitted in-line with a main heater. It holds a small supply, so long draws run out quickly.
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ASIN: B00C9X1X0MModel: ES4Category: Water Heaters
Overview
Homeowners and small businesses waiting too long for hot water at one sink get a mini tank that plugs into a standard outlet. It taps into the cold line at the sink, hangs on a bracket or rests on the floor, and stores a small hot supply right there.
No hardwiring and a fast supply at the tap make it simple to add. It can also sit in-line with a main heater to remove the wait for hot water. Temperature range and recovery time are not listed.
Who it's for
Remote bathrooms, garages and break rooms with light use get the most from it. Showers and heavy kitchen use need a larger heater.
Pros and cons
- Plugs into a standard outlet
- Wall or floor mounting
- Relief valve fitted
- Works in-line with a main heater
- Small supply for long draws
- Temperature range not listed
- Recovery time not stated
Performance notes
Supply runs out once the stored hot water is used, then the element reheats it, so draw length matters more than flow. Fitting it in-line with a main heater lets it bridge the wait until main hot water arrives. The glass lining protects the tank from corrosion.
Specifications
| Brand | Bosch |
|---|---|
| Model | ES4 |
| Dimensions & fit | |
| Item weight | 7.8 kg |
| Capacity & performance | |
| Capacity | 4 gallons |
| Wattage | 1440 watts |
| Power & efficiency | |
| Power Source | Corded electric plug-in |
| Voltage | 120 volts |
| Construction & materials | |
| Material Type | Glass-lined tank |
| Color | White, grey |
| Compatibility & installation | |
| Mount type | Wall or floor, bracket included |
| Mount Type | Wall Mount |
| Other details | |
| Special Features | Temperature and pressure relief valve, compact design |
| Style Name | Indoor Installation |
Frequently asked questions
How do I install the Bosch ES4 mini tank?
Tap into the cold water line and install it at the sink. It can be wall-hung with the included bracket or floor-mounted, and it plugs into a 120VAC outlet.
Does the Bosch ES4 need hardwiring?
No. It has a 120VAC plug-in connection rated at 1440 watts.
Can the Bosch ES4 work with my existing water heater?
Yes. It can be installed in-line with a larger hot water source to eliminate the wait for hot water.
Does the Bosch ES4 have a relief valve?
Yes, it has a temperature and pressure relief valve.