Yellow Jacket 49002 Low Side Gauge

The Yellow Jacket 49002 Low Side Gauge is a professional-grade 2-1/2 inch compound gauge designed for long-term field use. Built with a high-visibility blue color-coded steel case, this unit provides precise pressure readings from 30” vacuum up to 350 psi. This HVAC manifold gauge features comprehensive scales for R-12, R-22, and R-502 refrigerants, ensuring accurate diagnostic capabilities on legacy systems. It utilizes a standard 1/8 inch NPT Male bottom connection, making it easy to swap onto most existing refrigeration manifold sets. For technicians performing refrigeration pressure testing, the flutterless movement provides stable needle readings even under mechanical vibration. This low side compound gauge is a direct replacement part, engineered to maintain its calibration under standard service conditions. It is a critical component for any service tech looking to maintain reliability when monitoring suction line pressures and vacuum levels on residential or commercial equipment.

Key Benefits

• Broad Refrigerant Compatibility: Color-coded for R-12, R-22, and R-502 pressure-temperature references.
• Universal Fit: Standard 1/8 inch NPT thread fits into all standard manifold blocks.
• High-Visibility Dial: Oversized 2-1/2 inch face allows for faster, more accurate readings in low-light environments.
• Improved Stability: Internal movement designed to reduce needle flutter for precise diagnostics.

Common Questions

Can this gauge be used on R-134a systems?
While the 1/8 inch NPT threads may fit, the dial face is specifically calibrated for the pressure-temperature relationships of R-12, R-22, and R-502. Using it with other refrigerants would require a separate conversion chart for accuracy.

Does this gauge require a specific manifold brand?
No, the Yellow Jacket 49002 is compatible with any manifold set that accepts a standard 1/8 inch NPT connection.

Is the gauge face impact resistant?
The gauge features a high-grade steel case and a durable crystal designed to withstand common job site wear and tear during routine service calls.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.