Check valve - 1pc

In the event of a power outage, the aerator will suddenly stop working. Then the water can flow back through the hose and flood your apartment. To protect against this, a check valve is used, which works like the valves in the heart. On one side, air will pass and the aerator can work, but when the aerator is turned off, neither air nor water will flow on the other side. The mechanism is very simple and therefore reliable.