I recently had outdoor water sprinklers installed at my home. Since the installation (1 day ago) I have lost water pressure in two of my bathroom sinks only. The other bathroom sink has normal pressure as does the kitchen sink and showers. Nothing else seems to be affected. Again only two of the bathroom sinks are having the issue, no other water sources have a loss of pressure. What could be the cause? Have tried turning on and off the main water line etc. The sprinklers were attached to an outdoor water source.

Try taking the aerators off the affected faucets and see how pressure is then. If better, clean or replace the aerators. The aerators are located at the end of the spout where water comes out. They just unthread.

Will give it a try. Thank you