TOTOMO 360 Degree Swivel Dual Spray Faucet Aerator Installation Video
Unscrew the old aerator.
Check whether your faucet spout is female or male threaded. - Female-threaded spouts have their threads inside the end of the spout; male threads are found on the outside of the spout. - If your faucet has female threads, use the included adapter. If your faucet has male threads, install the aerator directly.
Install the new aerator - Make sure to check if the rubber ring is in place. Missing or improperly seated rubber ring is the most common cause of leaking.