Replacing the aerator for individual faucets is simple.
Proceed as follows:
- Unscrew the sleeve from the end of the faucet.
- Then slide the old aerator/perlator out in the direction of the thread.
- Then push the new aerator/perlator into the sleeve
- Then screw the sleeve back onto your faucet outlet
- You can find an aerator for individual faucets here