GROHE 

I have a 20 year old faucet that now leaks caused by a faulty sealing ring under the cartridge. A simple problem that I thought could be resolved by Grohe sending me a new sealing kit. Their customer service told me this is normal wear and tare and would not send me the sealing kit. Their mechanical parts warranty clearly states "free from manufacturing defects" which means it should last for life or be replaced for life. Not only wouldn't they replace the sealing kit, but it is no longer available (anywhere!) and I would have to replace the cartridge for $59 on Amazon. While it is true that I have enjoyed this faucet for 20 years, It was originally purchased with the promise of a lifetime of service. This will be my last purchase of any Grohe product as the company does not honor its warranty.

I had this installed by a professional plumber in April/2017. In Jan/2019
And in the last few months, we would find puddles of water on top of the granite by the backsplash and faucet. About once every week or two.
We didn't think too much about it because it was hard to see with our granite top color and just would wipe it up.
I finally checked under the sink and it was totally wet. We were fortunate that a bucket under the sink caught a lot of it. still , a mess. and water everywhere It could have been leaking for a month for all we know. I did check all the hose supply lines and they are not the problem. it must be an internal leak somewhere. I filled out the warranty info online and was told to send it back (no RMA /RGA for tracing purposes??) They "tested" it - while running the water - no leaks. sent it back to me -telling me it came with no supply lines (I took them off for shipping purposes -which I explained in my note -And they never read. They assumed that was the problem -so I called them.
Their customer service (after waiting on line for over a half hour ) is terrible. They didn't even read my email ,or look at my pictures I sent, or read the note I enclosed. They didn't call me to discuss. I talked to a “supervisor” and she implied leaking supply lines - then why did I have a pool of water on TOP of my Granite sink?? She had no answer. Suggested/offered sending me a replacement cartridge.

There is no way I can put this back in and trust it not to leak and ruin my new hardwood flooring. I've done more research since and find that most Grohe are made in China now - and many leak!- do your research! Many floors ruined.
Please do your due diligence. For over $300 I expected much more.
I’ll never recommend or purchase another Grohe product.