Undersized piping can lead to increased pressure drops, reduced flow rates, and decreased system efficiency. This can cause the compressor to work harder, increasing energy consumption and reducing its lifespan. On the other hand, oversized piping can lead to increased material costs, reduced system performance, and increased risk of refrigerant leakage. Oversized piping can also lead to oil trapping, which can cause compressor failure. Properly sized piping is critical to ensure efficient and reliable operation of the refrigeration system.