Return nozzles are used to return already purified water to the pool. They are usually located opposite the skimmer or in places where the so-called mixing of the water in the pool occurs. The nozzles must be adjusted in such a way that the entire contents of the pool circulates and so-called bubbles are not formed. The nozzles are made of steel or plastic. The suction nozzle is used to connect the vacuum cleaner hose.