The Ecosmart electric tankless water heater is supplied with 1/2” compression fittings.
Do not weld or use paste or use Teflon on fittings.
Connect the cold water supply line to the right side of the unit ("cold water inlet” in diagram on
page 3).
Connect the hot water supply line to the left side of the unit (“hot water inlet” in diagram on
page 3).
After both water lines are fastened securely, run water through the unit for at least 2 to 3
minutes to flush out any air pockets in the lines (purging). It is recommended that all faucets,
showers, etc. be run during this process. Failure to purge the lines of air can cause permanent
damage to the unit. This procedure MUST be performed before the electrical power is turned on.
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