Rheem · Tankless Water Heaters
Using adapters to connect the 3-prong power cord to a 2-prong outlet is unsafe and not permitted. The water heater requires a proper ground connection, which these adapters bypass.
Click steps to track your progress.
Ensure the outlet matches the water heater's 3-prong plug.
Do not use any type of adapter between the plug and the outlet.
If the outlet is not compatible, have a qualified electrician install a new grounded outlet.