Tankless Water Heater Installation Checklist

Tankless Water Heater Installation Checklist

Congratulations on #GoingTankless! See below for a quick list to make sure installation goes as smoothly as possible. This list applies to  Indoor and Outdoor Tankless Water Heaters.

NOTE: The water heater should be installed by a professional. Improper installation may cause failure or dangerous conditions such as gas leaking or explosion. Read your product manual and FAQ thoroughly and have it available for your installer to use.

Water Heater Location

  • Installed indoors/outdoors
  • Close to area of mostly used outlet
  • Protected from freezing temperatures
  • Proper clearance from combustible surfaces observed
  • Sufficient fresh air supply for proper operation of water heater
  • Air supply free of corrosive elements and flammable vapors
  • Provisions made to protect area from water damage
  • Sufficient room to service heater
  • Combustible materials, such as clothing, cleaning materials, rags, etc. clear of the heater and vent piping
  • Water heater is properly attached to the wall

Water Supply

  • Water supply has sufficient pressure
  • Air purged from water heater and piping
  • Water connections tight and free of leaks
  • Water filter is clean and in place
  • Materials used are as instructed in this manualWater pipes are insulated

If it's Electric

  • Electrical Service Requirements (dedicated breakers)
  • Water Pressure Requirements
  • Permit (if state required)
  • Dry/Non-freezing location
  • Correct wire gauge
  • Voltage matches rating plate
  • Water heater is properly grounded
  • Wiring meets all local codes
  • GFCI (Ground Fault Circuit Interrupter) Protection where required

If it's Gas Supply

  • Gas type matches rating plate
  • Gas supply pressure is sufficient for the water heater
  • Gas line equipped with shut-off valve, union and sediment trap
  • Approved pipe joint compound used
  • Commercial leak detector or soap and water solution used to check all connections and fittings for possible gas leak
  • Gas Company inspected installation (if required)

Relief Valve

  • Pressure Relief Valve properly installed and discharge line run to open drain
  • Discharge line protected from freezing

Clean Your Water Heater

This is a must to keep your water heater running efficiently for years to come. Be sure to flush every 6 months with the EZ-Flush Descaler Kit. The EZ-FLUSH system is designed to work seamlessly with 0 

and virtually any water-based equipment. It includes our Eccotemp Descaler that is specifically made to dissolve the toughest build-up and is a non-toxic concentrate, which is certified to NSF/ANSI 60 for use as a cleaner in portable water systems.

Tankless Water Heater Installation Checklist

Find The Right Water Heater

Our agents are here to help find the right water heater for your installation and needs. Tankless water heaters are not a one size fits all!

  • sh22 natural gas tankless water

    Smart Home 6.8 GPM Outdoor Tankless Water Heater, SH22 Series

    "Great value. If you compare the features with any other brands, you will not find another value. I’ve been extremely impressed with this unit."

    - Adam V.
  • 45hi natural gas tankless water

    6.8 GPM Indoor Tankless Water Heater, 45 Series

    "Saved The Day! We had a very old water heater that was notorious for taking 1 minute to get hot in the shower, the 45HI-NG has the shower hot in 10 seconds! Thank you Eccotemp!"

    - Tyler C.
  • esh-2-5 mini tank water heater

    Smart Home 2.5 Gallon Electric Mini Tank Water Heater

    "Great price, fast delivery. I installed the unit under the kitchen sink. From opening the box, plumbing and connecting via Wifi were no more than 60 mins. I'll monitor the daily KW usage. Strongly recommend trying this unit."

    - Wade T.
  • shlx tankless water heater

    L5 1.5 GPM Portable Outdoor Tankless Water Heater

    "We love ours. Imagine cool weather with muddy 4 wheelers, muddy dogs, muddy kids, & gear...well that would destroy a normal weekend but not ours. We love taking warm showers and cleaning up with ours! It truly has been a game changer."

    - Mark F.
  • 6gb natural gas tankless water

    Builder Series 6.0 GPM Indoor Tankless Water Heater

    "Cannot be happier with this water heater. My family came home from a long weekend and we all were in desperate need for showers. Family of five showered back to back with no issues. Thanks for making life that much easier!"

    - Ron S.
  • sh22 liquid propane tankless water

    Smart Home 6.8 GPM Outdoor Tankless Water Heater, SH22 Series

    "Works great. Love it, does great for a family of 4, love the app and how you can adjust temp from phone. Works great for younger kids."

    - Redd
  • em-7-0 mini tank water

    Under Sink EM-7.0 Gallon Electric Mini Tank Water Heater

    "This guy recuperates in 20 minutes or less... Easily installs and works on 120 volts with very low power consumption and you do not have to wire up for high amps or a 240 line. I highly recommend this unit."

    - Louis G.
  • el10 portable tankless water

    Luxé 3.0 GPM Portable Outdoor Tankless Water Heater

    "Quickly heats water. I like the thermostat with digital reading of water temperature. Has ample pressure and never ran out of warm water rinsing my horse whose reaction was that he liked the warm water."

    - Betty S.
  • el22i natural gas tankless water

    6.8 GPM Indoor Tankless Water Heater, EL22 Series

    "Great buy! Great purchase! Installation was quick and easy. Highly recommend!"

    - John C.
  • i12 liquid propane tankless water

    4.0 GPM Indoor Tankless Water Heater, i12 Series

    "I installed the unit a month ago with some fantastic tech support. Over all I am very happy with the performance of the heater and would recommend this unit to anyone."

    - Marc D.
  • esh 2 5 mini tank water

    Smart Home 2.5 Gallon Electric Mini Tank Water Heater

    "Look and size of the hot water heater is perfect if you are adding this to a work shop or bathroom. This water heater uses Wi-Fi so you can connect to Alexa and ok Google. Very nice packaging and very clear, easy to follow directions."

    - Matt
  • el7 portable tankless water

    Luxé 1.85 GPM Portable Outdoor Tankless Water Heater

    "Great Portable Water Heater. Delivers functionally and aesthetically. Very easy to set up and came with everything I needed. Well constructed and I like that I can easily see the water temp. Look forward to years of use."

    - ARS