@user597576398786: Still losing refrigerant every time you hook up a hose? This solid brass safety valve connector locks tight, vents safely and fits both R410A and R22 systems. Clear ON/OFF cap, precise SAE threads and multiple size options mean faster, cleaner, safer charging on every job. Upgrade your kit and protect your refrigerant—and your time. #hvactools #airconditioner #refrigeration #r410a #r22