and durable construction These refrigeration access valves are built from copper and materials to provide long service life across a range of applications. The copper construction contributes to safety and durability in demanding environments. Wide compatibility and versatile use Designed for refrigeration and HVAC systems, they are suitable for refrigerators, air conditioners, refrigeration compressors, and refrigeration airconditioning units. They can also be used in automotive settings, including as drain ports and test ports on fuel rails of certain fuelinjection engines. Easy to use for maintenance The valves are simple to operate, making maintenance tasks in refrigeration and airconditioning systems more straightforward. They function effectively as drain ports and test ports, helping you perform routine servicing and system checks with ease. Safe and reliable performance Featuring a safe working pressure of 4 MPa, these valves provide dependable performance for maintaining and testing pipe fittings. The copper construction enhances safety and durability under pressure. Practical use scenarios Servicing a household refrigeration or HVAC unit: use as drain or test ports during routine maintenance or leak testing to ensure operation. Automotive fuel rail testing: employ as drain ports and test ports on fuel rails of certain fuelinjection engines to facilitate diagnostics and maintenance. General pipe fitting maintenance in refrigeration and related systems: use for testing connections and verifying integrity during installation or service work.