The make is Grohe. If it needs silicon grease, I'd better ask a plumber. I can unscrew things, but don't have special tools, except possibly a mole wrench!
My Grohe bath/shower mixer is not working properly, and Grohe tells me that I need a new cartridge 47364000.
My question is: Can I easily fit that myself or does it need special tools and a professional plumber?