This is a picture of an aerator and cartridge we recently removed from a customer’s home just a few weeks after they installed a new faucet. Debris from the existing pipes had plugged the cartridge and aerator causing a leak and very poor water flow.
This problem could have been avoid had the homeowner flushed the water lines prior to installing the faucet. Over time pipes can develop deposits of minerals and other debris in the pipes. When you are remodeling even is just replacing a sink or faucet some of these deposits can be knocked loose and if not flushed from the system will lodge in the faucet and cause problems as you see in the picture. In more extensive remodeling it is even more critical because not only can built up minerals be knock loose but there may be fine shaving or other debris from construction. When I was building new homes we always flushed the entire house before beginning the final installation of plumbing fixtures.
Make sure whoever installs you new faucet or other plumbing fixtures flushes the line prior to installation.