- Compatible with 4 Types of Refrigerants: This professional 3-way air conditioning diagnostic manifold gauge set is designed to work with R134A, R12, R22, and R502 refrigerants. It enables accurate pressure checks in AC lines, leak detections, Freon top-offs, recovery efforts, and full A/C system recharges. - Durable and Reliable Hoses: Constructed from PVC with four reinforced layers, these hoses can handle pressures up to 600 psi and burst pressures of 3000 psi. The interface features antislip sealing gaskets to prevent loosening during operation, significantly minimizing the risk of leaks and refrigerant loss. - Precise and User-Friendly Pressure Gauges: Featuring a combination of dry and liquid-filled designs, these gauges offer enhanced performance, especially in cold conditions. The calibration screws provide accuracy within ±1.6%, and the easy-to-read Fahrenheit temperature units simplify monitoring. The sight glass design allows you to observe the refrigerant flow during filling, ensuring proper operation. - Sturdy Construction: Built from solid brass, aluminum, PVC, and high-quality plastic, this gauge set is engineered to withstand heavy use and accidental drops, ensuring long-term reliability and enhanced performance in demanding environments. Use Scenarios: 1. Ideal for HVAC professionals conducting routine maintenance or troubleshooting in residential or commercial air conditioning systems. 2. Perfect for technicians performing refrigerant recovery and recharge tasks, ensuring accurate leakage detection and refilling. 3. Suitable for DIY enthusiasts looking to maintain their vehicle's air conditioning system efficiently and effectively.