Over the past week have noticed that my Grohe faucet (older model of this http://db.grohecatalog.com/upload/pdf2/32244sp.pdf) is putting out significantly less water (both hot and cold). I am not a plumber but pretty handy. I am thinking it's one of the pressure springs or some filter. Can you help me diagnose what's going on and whether this is something I can fix or do I need a pro?
Just an add on... the faucet was installed about 4 yrs ago. Other faucets in the house working fine.