- The R134A AC Refrigerant Filling Hose Set with Manometer is ideal for both household cooling systems and R134A automotive applications. Its cap valve is compatible with both R134a piercing and self-sealing types, ensuring versatility for various uses. - Features a BPV-31 ball valve that fits pipes with outer diameters of 1/4, 5/16, and 3/8 inches. It is an effective replacement part, compatible with multiple part numbers including AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, and MPV31. Constructed from durable metal, it offers excellent longevity and resistance to corrosion. - One end of the hose is equipped with an R134a piercing valve for direct connection to the refrigerant canister, while the other end features a 1/4 SAE female thread for easy attachment to the refrigerator’s male thread. The color-coded gauge displays scaled readings in Fahrenheit and R134a for quick reference. - Practical applications include: - Refilling refrigerants in home air conditioning units. - Servicing automotive air conditioning systems for optimal performance. - Quick diagnostics with the built-in gauge for accurate pressure readings. - This product combines functionality, compatibility, and durability, making it an essential tool for both DIY enthusiasts and professionals in HVAC and automotive fields.