K-Leak Testers is an essential equipment that allows the pressurization of auto air conditioning systems; it works by simulating the operating pressure reached by the A/C system while working at the standard conditions. Using this equipment, the technician will be able to pressurize the system at the right pressure value, for a given refrigerant; the right operating pressure of each refrigerant is shown by the pressure gauge dial (each refrigerant is identified by different colors). Once the operating pressure is reached, the technician will be able to detect leakages in the systems (eg. caused by faulty components, badly executed flaring, defective welded joints) which will cause loss of pressure, detected by the pressure gauge included in the kit. The technician will thus be able to carry out precise diagnostics as to the type of failure, fix it, and guarantee system optimization.