Eccotemp L5 Portable Tankless Water Heater (1.4 GPM 37,500 BTUs)


The Eccotemp L5 Tankless Water Heater is the best selling model of its class on the market today. It’s designed for the customer who needs portable, instant hot water in a variety of situations, from camp showers, hunting cabins, and RVs to washing livestock, horses, boats, vehicles and crafts. Easily adaptable and efficient, the L5 is designed for portable outdoor installation, works off a standard 20 pound propane tank, and attaches to any standard garden hose. It also features water fittings that are ½ NPT (making it easy to modify with standard plumbing fixtures), an adjustable water temperature, and battery ignition that means no electricity required. With such a variety of useful features, the Eccotemp Water Heater is an invaluable tool for getting the job done, whether it’s getting clean after a day outdoors or washing the mud off the ATV.

Specs & Features

  • Outdoor use only
  • 37 500 BTU
  • 30 to 35 °F rise at 1.4 gallons per minute
  • 1/2″ NPT water fittings plumb easily into standard American fittings
  • 20 minute auto safety shut off timer

Out of stock

SKU: NE33001 Category:

Additional information

Weight 15.0003 lbs
Dimensions 12 × 20 × 4.5 in

Full Specs

Eccotemp L5 Portable Tankless Water Heater

  • Outdoor use only
  • 37 500 BTU
  • Provides a maximum of 1.4 gallon of hot water per minute
  • 30 to 35°F rise at 1.4 gallons per minute
  • 2 “D” cell batteries (sold separately) provide fire ignition so no electricity needed
  • Minimum flow rate of water is approximately 0.4 gallons/minute
  • Control knob lets you adjust the temperature from 80 to 120 degrees Fahrenheit
  • 1/2″ NPT water fittings plumb easily into standard American fittings
  • Adapter attaches to any standard garden hose.
  • Shower nozzle has an on/off control
  • Equipped with a carry handle for easy transportation
  • Unit needs a 20 to 80 PSI water pressure from the water source
  • Includes hose and regulator for attaching to standard LP tank
  • Works for about 18 hours on an average barbecue 20-pound propane tank
  • 20 minute auto safety shut off timer

Weight: 12 lbs
Dimensions: 14.5″ tall (18″ with rain cap) x 11.5″ wide x 4.5″ deep

Included in Box

  • Eccotemp L5 Tankless Water Heater
  • 5.75’ CSA LP regulator hose
  • ½” NPT connection fittings to garden hose adapter
  • Heat shield
  • On/off shower head and hose
  • Installation hardware pack



Can I install this unit inside my RV, cottage, cabin, etc?

No. We don’t recommend doing so as there is no safe way to vent the gas outside.

Can the unit be mounted horizontally?

No, the unit must be vertical. The flame from the burners must go straight up or charring of the wiring can occur.

I am interested in venting the exhaust through a shower room wall. Can a duct tape be used?

The L5 product is designed for portable outdoor installation and works off a standard 20-pound propane tank. If used indoors, it may cause fire and the propane fumes could be hazardous.

How do I know which model is right for me? the L5 or the L10?

If you’re going to need to supply hot water to more than one appliance operating at the same time (ex: a shower and a sink), you will need the extra flow rate provided by the L10. Otherwise, the L5 is great at running a single shower.

Can I install a portable tankless water heater to faucets/fixtures?

No. Portable tankless water heaters are not designed to replace any fixtures or faucets. They are not meant for permanent installation. Portable Tankless Water Heaters such as L5, L7 and L10 are meant for outdoor recreational use, with the use of a standard garden hose and should be used only outdoors. When not in use, they should be disconnected and stored in a warm and dry location. Installing the units as a permanent installation can void any warranty due to being deemed as improper install.

Will a standard shower hose fit to replace the 4-ft hose that came with the L5 unit?


Does the L5 unit come with pipe fittings for the water inlet and water out?

Yes. The Eccotemp L5 unit uses pipe thread fittings for the water inlet and outlet. An adapter is also included for the water inlet so a garden hose can be attached.

Can I use a longer hose to the L5 unit and/or shower head?

Yes. If you can find one that fits just right and as long as it can maintain the required pressure, there is no limit to the length of hose you can use.

The L5 product description says: “The heater automatically shuts off after 20 minutes”. Does that mean if I run water for a minute, the heater stays on for 20 minutes?

No. The heater turns on when you turn it on. It shuts off when you shut it off. Automatic shut off is an emergency feature. If in case, you left in on by accident, the heater shuts off after 20 minutes of continuous running.

Can the 20-minute shut off time be disabled?

The 20-minutes timer in the L5 and L10 products cannot be turned off. This is a safety feature that is programmed inside the ignition box and then sealed. You can buy a GE 24-hour timer and connect your pump to it. Set the circle tabs in the timer to alternate every hour or 30 minutes to switch the pump on and off.

Can I use the product at elevation 6,200 feet?

The Eccotemp L5 unit has been field tested up to 7,200 feet. However, the manufacturer recommends using the L5 unit between elevation 5,500-6,000 feet. The water may not get hot enough at a higher altitude and will likely require manual adjustment of the unit to reach desired temperature.

How do I troubleshoot an L5 unit due to freeze/water pressure damage?

Freeze damage or water pressure will void your warranty. This comes from leaving your unit in cold conditions as well as not properly draining which creates a buildup water that ruptures pipes.

In order to prevent this, you must take the following steps:

  • Ensure that the unit is plugged in and there is electricity being supplied at that outlet
  • Your vent kit must have a back-flow preventer to ensure cold air does not backflow through to the heat exchanger and risk freeze damage.

THE MANUFACTURER WARRANTY WILL NOT COVER RUPTURES IN ITS SYSTEMS DUE TO FROZEN WATER IN THE PIPES. It is the homeowner and/or installers responsibility to ensure that the incoming and outgoing water lines are properly insulated and protected against freeze.

Outdoor model numbers, L5 and L10, DO NOT have an antifreeze circuit installed. If the temperatures get at or below freezing, you must drain the unit by unscrewing the drain stem located at the bottom right of the unit AS WELL AS unhook the outgoing water line to ensure proper drainage from the heat exchange.

How do I clean the filter screen of my Eccotemp Portable Tankless Water Heater?

This guide is for the following Eccotemp Models: L5, L7, L10, and the FVI-12 tankless water heater systems:

1st. Make sure that your Eccotemp Tankless water heater is turned off, and also verify that your gas supply is turned off.

2nd. Disconnect the water source hose from the water inlet pipe located at the far right of your Eccotemp water heater.

3rd. The filter screen can be found at the opening of the water inlet pipe. Place your finger/s on the screen to remove any particles that may be obstructing the flow of water. If the screen appears clogged or rusty, you may clean it by lightly scrubbing it with a metal wire brush available at any hardware store.

If your screen is missing, heavily corroded, or damaged, you may need to contact us at 1-800-296-9545 to order a replacement filter screen.

The unit does not start – No audible clicking sound during commissioning, what do I do?

a. First, check whether there is flow of water on the right side of the device. If the input and output are inverted, the unit will not work. The input is at the far right and the output in the middle.

b. The on/off switch to the “-” mark should be depressed (only Eccotemp L5), or when it has the left knob of the burner output to be opened.

c. Check whether the batteries are fresh and that they are installed in the correct position.

d. The main reason why the device does not ignite often is because of insufficient water pressure. You must ensure that a minimum, constant water pressure of 1.38 is present.

e. Lastly, check whether all plugs are correct, possibly remove and reinstall it again to mount it securely.


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