Tempered water is produced at the output of which device?

Tempered water is produced at the output of which device?

• A. The output of the three-way mixing valve
• B. The water heater
• C. The cold water inlet
• D. The mixing faucet

Answer: (A)

Tempered water comes from blending hot and cold water to a safe, fixed temperature. A three-way mixing valve is designed to do exactly that: it takes hot water from the heater and cold water from the supply, mixes them in the right proportions, and outputs water at the tempered temperature. This output remains stable even if supply temperatures or flow rates change, which is essential for preventing scalding. The water heater alone would produce hot water, not tempered; the cold inlet is just cold water; a mixing faucet can blend on-site but the consistent tempered output is produced by the three-way mixing valve upstream of the faucet.

Tempered water comes from blending hot and cold water to a safe, fixed temperature. A three-way mixing valve is designed to do exactly that: it takes hot water from the heater and cold water from the supply, mixes them in the right proportions, and outputs water at the tempered temperature. This output remains stable even if supply temperatures or flow rates change, which is essential for preventing scalding. The water heater alone would produce hot water, not tempered; the cold inlet is just cold water; a mixing faucet can blend on-site but the consistent tempered output is produced by the three-way mixing valve upstream of the faucet.