Marey GAS 6L – 1.58GPM Natural Gas Tankless Water Heater



Quick Overview:

  • Water heating solution for a point of use application
  • Better apt for outdoor installation with front cover design
  • No electrical connection required, pulse ignition, powered by (2) D batteries.
  • Activated by water flow, not water pressure.
  • Multiple safety sensors including auto cut-off, automatic ignition, anti-dry combustion, over-pressure, overheating, flameout protection, and twin solenoid valves.
  • Convenient summer/winter switch to control your temperature all year round.
  • 5-year warranty


  • Water-controlled automatic ignition
  • This unit provides more comfort and energy savings in the form of lower gas consumption in warmer months.
  • Sufficient flow is always required to keep the overheat safety sensor from shutting the unit off.
  • Anti-dry combustion protection
  • 1.58-GPM heater is activated by water flow rather than water pressure
  • Minimum activation rate: 0.48 GPM
  • Maximum input rating: 42,000 BTUs
  • Pressure rating: 2.5 – 116 PSI
  • Water connection location/size: Bottom/0.5-inch NPT


Compact design saves space and is easy to install almost anywhere. It provides endless hot water on demand and only as needed. MAREY’s 6L gas tankless water heater has a maximum input rating of 42,000 BTU/h and provides a flow rate of up to 1.58 GPM output. No electrical connection is required; perfect for off-grid applications. Better apt for outdoor installation with front cover design. This flow activated unit is perfect for areas with low water pressure. Ideal for indoor usage, apartment, cabins, and tiny homes. Control your temperature all year round with a convenient summer/ winter switch. Adjustable manual temperature control, multiple safety sensors including overhead and anti-dry heating. Not recommended for elevations above 2,000 ft.

  • Minimum Activation Rate 0.48 GPM
  • Minimum Temperature 13.5 °F – 66°F MAX.
  • Water Connection Location – BOTTOM
  • Water Connection Size 1/2” NPT

Flow Rate:

  • Flow Rate @ 35°F Rise 1.78 GPM
  • Flow Rate @ 45°F Rise 1.38 GPM
  • Flow Rate @ 55°F Rise 1.13 GPM
  • Flow Rate @ 65°F Rise 0.96 GPM

Additional Features:

  • 6L Tankless Liquid Propane Water Heater.
  • Flow activated, adjustable manual temperature control & twin solenoids.
  • Compliant with Department of Energy gas tankless water heater requirements.
  • Very DIY friendly and easy to install.
  • Eco-friendly tankelss water heater: Save energy using less gas during the warm months with the Marey Tankless Liquid Propane Gas Water Heater; Color: White.
  • Battery powered: Tankless water heater starts with pulse ignition powered by (2) D batteries (not included); No cords necessary.
  • Multiple safety sensors: auto cut-off, automatic ignition, anti-dry combustion, over-pressure, overheating & flame-out protection.
  • Temperature control: control your temperature year-round with the convenient summer/winter switch.
  • Compact design: Ideal for indoor use in apartments, cabins, and tiny homes and any remote area.
  • Excellent customer service support and 5 year warranty.
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