What is the color coding for the low-pressure gauge on a refrigeration gauge manifold?

The low-pressure gauge on a refrigeration gauge manifold is color-coded blue. This color coding is a standardized practice across the HVAC and refrigeration industries to help technicians quickly identify specific gauges and their corresponding pressures.

The blue gauge indicates the low pressure side, which is important for monitoring the suction pressure in a refrigeration system. This pressure is critical for ensuring that the compressor is operating efficiently and that the system is properly charged with refrigerant. Understanding the color coding is crucial for technicians when diagnosing issues, performing maintenance, or charging a refrigeration system, as it ensures that they are working safely and effectively with the correct gauges.

Other colors, such as red, green, and yellow, are typically used for different purposes in refrigeration systems, such as indicating the high-pressure side or for specific refrigerants. Knowing that blue signals the low-pressure side allows for rapid and accurate adjustments and troubleshooting within the cooling cycle.