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GL 2.5 GL 4 GL 6 Plus
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$159.95 $174.95 $209.95

The new Ariston is more than just a pretty water heater.

Take a look inside our new GL Series and you'll find some exceptional inner qualities as well. Redesigned from the ground up by the world's leading point-of-use water heating manufacturer, the new GL Series features a 6 Gallon Plus model, glass lined tanks, and a 6 year warranty.


Ariston Performance Advantage

Did you know that over 80 billion gallons of water are wasted in the U.S. every year due to long waits for hot water at the tap?

Ariston mini-tank, point-of-use water heaters save water and money by providing instant hot water at the tap. The powerful 1500 watt elements dramatically reduces recovery time, and the glass-lined, well-insulated tank minimizes heat loss. And we have so much faith in the performance of the new GL Series, that we're offering a 6 year warranty on the tank.

Finding the perfect match for you is a snap.

Ariston point-of-use water heaters are designed to supply instant hot water to sinks in kitchens, bathrooms, in homes, restaurants, and in offices. Refer to the chart below to select the model that corresponds to your intended use and the number of sinks the heater will be providing hot water for.

Model Gallon Capacity Uses
GL2.5 2.5-gallons 1 sink
GL4 4-gallons 2 sinks
GL6 Plus 6-gallons + 2 or more sinks


Before making your final decision, also consider the location where the heater will be installed. The GL2.5 and GL4 are designed to fit under most sinks. The GL6 Plus is generally too large to install directly under a sink, but this model offers the flexibility of being mounted vertically or horizontally. 
Simply tap into the cold water line and install the heater directly at the sink. Ariston heaters may also be installed in-line with a larger hot water source, such as a Bosch AquaStar tankless heater, or a storage tank heater. Lightweight and compact, the 2.5 and 4 gallon models plug into a standard 110 volt outlet. The 6 Gallon Plus requires hard wiring and can be mounted vertically or horizontally. All models include a mounting bracket for wall hanging, or the unit can sit directly on the floor.  
Flow diagram Flow diagram
The redesigned Ariston GL Series offers a powerful package of features:
  • 6 year warranty on tank
  • Glass-lined tank for longer life
  • Mounts on wall or floor
  • Temperature/pressure relief valve included
  • 2.5 and 4 gallon models plug into standard
        110 volt outlet
  • 6 Gallon Plus requires hard wiring
  • Meets ASHRAE 90.1 Standard


Specifications GL 2.5 GL4 GL6 PLUS
Tank Volume 2.5 Gallons 4 Gallons 6 Gallons
Dimensions 14" x 14" x 10" 14" x 14" x 12" 17" x 17" x 14"
Recovery at a 90F Rise 8 GPH* 10.5 GPH* 12.5 GPH*
Water Connections inch NPT inch NPT inch NPT
Relief Valve installed installed included
Multi-Directional Mounting no no yes
*Gallons Per Hour - First Hour Recovery
All Units
Voltage 110/120 Volts Phase Single
Amperage 12.5 amps Temperatures 65 - 145F
Heating Capacity 1500 Watts Operating Pressure 150 psi


Limited 6 year Warranty

Ariston, through its U.S. distributor Controlled Energy Corp., (hereinafter CEC) guarantees this water heater to the Owner (hereinafter "Owner") of the water heater at the original installation location against defects in material or workmanship for the periods specified below.
Ariston diagram
1. The Inner Tank - If the inner tank leaks within six (6) years from the date of original installation of the water heater, because of a defect in material or workmanship, CEC will furnish to such Owner a new heater of the then prevailing comparable model.
2. Any Component Other than The Inner Tank - If any other component part (other than the inner tank) proves to be defective in material or workmanship within one (1) year from the date of original installation of the water heater, CEC will furnish the Owner with a replacement of the defective part(s).
3. Verification of Date of Original Installation - When Owner cannot verify or document the original date of installation, the warranty period begins on the date of manufacture marked on the tag affixed to the water heater.

1. This Limited Warranty shall be the exclusive warranty made by the Manufacturer and is made in lieu of all other warranties, expressed or implied (whether written or oral), including, but not limited to, warranties of merchantability and fitness for a particular purpose.
2. Manufacturer shall not be liable for any incidental, consequential, special or contingent damages or expenses arising, directly or indirectly, from any defect in the water heater or the use of the water heater.
3. Manufacturer shall not be liable for any water damage arising, directly or indirectly, from any defect in the water heater component part(s) or from its use.
4. Manufacturer shall not be liable under this warranty if:
a) The water heater or any of its component parts has been subject to misuse, alteration, neglect or accident, or
b) The water heater has not been installed in accordance with the applicable local plumbing and/or building code(s) and/or regulation(s), or
c) The water heater has not been installed in accordance with the printed manufacturer's instructions, or
d) The water heater is not continuously supplied with potable water.
5. The Owner and not the Manufacturer or his representative shall be liable for and shall pay for all field charges for labor or other expenses incurred in the removal and/or repair of the product or any expense incurred by the owner in order to repair the product.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which may vary from state to state.

Important: Owner shall keep this certificate.

Note: A water heater should be installed in such a manner that if it should leak, the resulting flow of water will not cause damage to the area in which it is installed.

How the owner can secure service or make a claim
1. Owner should contact the dealer who sold the water heater covered by this warranty or
2. Owner should submit the warranty claim directly to CEC at the address listed below, and they will arrange for the handling of the claim.
3. Whenever any inquiry or service request is made, be sure to include the water heater model number, the date of manufacture, date of installation, Dealer's name, and the watts and voltage.
4. When returning the water heater or component part(s), they must be individually tagged and identified with the Returned Goods Authorization # issued by CEC and shipped prepaid to CEC at the address below.




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