Direct and indirect moisture in the cooling system, water and metal corrosion circulate in the cycle and this decreases life of the compressor operating in the system and other connection components. Changeable cartridge cases are liquid line components which efficiently maintain water and moisture in the system, protect the cycle against harmful acids and which consist of filler materials with an outer casing. Besides, this case keeps abrasions of moving parts on the circuit, dirt such as debris, welding burr and sediment. It embodies unwanted substances in it during filtration (straining) by separating foreign particles and oil. The cartridge placed in it can be cleaned, changed and placed whenever you want.