What device controls the water temperature maintained in a hot water tank for single-family use?

What device controls the water temperature maintained in a hot water tank for single-family use?

• A. Thermostat
• B. Pressure reducing valve
• C. Thermometer
• D. Mixer

Answer: (A)

The device that controls the water temperature maintained in a hot water tank for a single-family home is the thermostat. The thermostat senses the water temperature inside the tank and turns the heating element (electric) or burner (gas) on and off to hold the water at the programmed setpoint. This regulation keeps the tank at a consistent temperature. A pressure reducing valve only lowers incoming water pressure, not temperature. A thermometer merely measures temperature without controlling it. A mixer blends hot and cold water at the fixtures to achieve a comfortable outlet temperature, but it does not regulate the tank’s temperature itself.

The device that controls the water temperature maintained in a hot water tank for a single-family home is the thermostat. The thermostat senses the water temperature inside the tank and turns the heating element (electric) or burner (gas) on and off to hold the water at the programmed setpoint. This regulation keeps the tank at a consistent temperature.

A pressure reducing valve only lowers incoming water pressure, not temperature. A thermometer merely measures temperature without controlling it. A mixer blends hot and cold water at the fixtures to achieve a comfortable outlet temperature, but it does not regulate the tank’s temperature itself.