In a water source heat pump, the reversing valve controls which refrigerant state?

• A. Low Pressure Vapor
• B. High Pressure Vapor
• C. Liquid Refrigerant
• D. Superheated Gas

Answer: (B)

The reversing valve controls the path of the high‑pressure refrigerant vapor leaving the compressor. By switching which coil receives that vapor, it reverses the direction of the refrigerant flow and thus the mode of operation (heating vs cooling) without changing the liquid line or the metering side. Because it sits in the gas side and handles the discharge vapor, the state it governs is high‑pressure vapor. The liquid refrigerant and any low‑pressure vapor are not what the reversing valve directs.