HCPRO anti-blowback adapters are a crucial tool that helps prevent refrigerant loss and ensures safe and efficient operation when servicing HVAC systems or other applications involving pressurized systems. Our Anti-blowback adapters are designed with a thrust bearing that reduces friction, allowing the hose to be easily connected, helping reduce the loss of refrigerant and making the connection easier for the technician. All our adapters are rated for 800 psi working pressure and burst pressure of 4000 psi and compatible with R-410A, CFC, HCFC & HFC refrigerants.