Marey GA16NGDP 4.3 GPM Tankless Water Heater Open Box (free upgrade to new unit)

  • Model: Marey
Marey GA16NGDP 4.3 GPM Tankless Water Heater Open Box (free upgrade to new unit)

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  • Free Replacement Shipping
To place an order over the phone or for immediate assistance, please call (888) 978-4993. For after hours sales please call (888) 999-1522.

Open box - As brand new.   Most open box units are returns that have never been used.  Ships from the manufacturer in FL.  Includes same 5 year warranty as new units.

Transit time for most orders: 1-3 days

Manufacturer Refurbished 100% certified by the manufacturer
Manufacturer Refurbished Guaranteed to work like new or your money back
Manufacturer Refurbished 5 year manufacturer warranty
Manufacturer Refurbished Authorized Marey dealer
Manufacturer Refurbished Ships out same or next day


Quick Overview:

No electrical connection required.

  • Compact design saves: space and allows for easy installation just about anywhere.
  • Heats unlimited volume of water as needed.
  • Hot water is available in just a few seconds.
  • Activates by water flow from the moment the faucet is opened.
  • 5-year warranty.


- Saves water and up to 60% less electricity than conventional tank water heater, making it cost-effective and environmentally friendly.
- Can last a lifetime, keeping up to 87% efficiency level.
- Rustproof, no water loss due to leaks.


  • Tankless Natural Gas Water Heater
  • Compliant with Department of Energy gas tankless water heater requirements
  • Digital Panel displays outgoing water temperature
  • Very DIY friendly and easy to install
  • Heats unlimited volume of water on-demand as needed
  • Does not require electricity (operates with 2D cell batteries)
  • Perfect alternative for homes with frequent power outages or off-grid applications
  • Only uses gas while water is flowing
  • Works easily with low levels of water pressure
  • Anti-combustion and gas pressure safety protection
  • Can maintain 87% efficiency level throughout a lifetime
  • Rustproof design, no water loss due to leaks
  • Saves water and uses up to 60% less electricity than conventional tank water heaters, making it cost-effective and eco-friendly
  • Excellent customer service support and 5 year warranty

The powerful 16L Natural Gas Tankless Water Heater with digital display is the perfect energy efficient solution for your home which will not only help you save money, but also help you save money on your electric bills. This powerful unit only operates on 3V, making it ideal for off-grid applications or anywhere electricity is limited. Copper heat exchanger resists corrosion allowing it to last a lifetime. At a standard faucet flow of 1.5 GPM, the temperature increase is 95 degrees Fahrenheit. The LCD display gives an accurate outlet water temperature which ensures your hot water is always at the exact comfort level which you desire.

Marey products come with a 5 year manufacturer warranty.

Customer Reviews

Based on 13 reviews

Give it another month and contact me so far so good is all I can do for now


Marey GA16NGDP 4.3 GPM Tankless Water Heater Open Box

Works great

Easy Installation. Hot, hot water on demand.

The water heater is fantastic.

Fast shipping with frequent updates as to the status of your order. Received exactly what I ordered. The water heater works perfect for my little house. Way more water pressure than with the standard tank style.

Professionally shipped & quick arrival. Excellent unit and a superb price!

Unit arrived quickly and undamaged. Easy to follow instructions and installation was a breeze. After some fine tuning to accommodate the GPM of water heads there is now a endless supply of hot water to my house. The $200 local energy rebate didn't hurt either.



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