Tankless Water Heater Installation Checklist

by Eccotemp Systems

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 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 Tankless Water Heaters 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