Answer: electrical connection and connection to the sanitary water network.
The main types of connection for a water heater are the electrical connection and the connection to the domestic water network. Regarding the electrical network, just follow the recommendations of the manufacturer of the product, the connection must be made by the thermostat of the device. Let's move on to the plumbing connection. The instantaneous water heater can be installed in free flow (without safety group) or under pressure (with safety group). In some rare cases, it will be necessary to add a pressure reducer for the water heater (when the water pressure is too high) or a buffer tank (to store excess hot water). In addition, a dielectric connection is required for the electric water heater. You too, send us your brico question