Sometimes you just could not believe what you see inside that pipe as you remove them from the system. Flushing all the debris and rust out of the radiator as well as the engine is important to ensure the efficiency of your cooling system. Try to reduce the amount of tap water inside the cooling system as the mineral elements from the tap water become crytallized as water boils, they will block out the tiny runways inside the radiator and deteriorate the efficiency of the cooling system.
