[KeepingItReal]

Originally Posted by shanson99

I have black flakes also. I called warranty and they told me it was the inside of the hose under the kitchen sink. I was told I was out of warranty but the manufacturer would replace the hose. The manufacturer mailed me new parts. I haven't called a plumber yet for the installation.

Very same thing here, black particles were coming from inside the flexible hose on the Delta kitchen faucet and out of warranty. Delta mailed us a new one and took care of the problem. Very easy to replace yourself if you are handy at all.

Delta sent us the wrong one part # RP44647 first but then sent us the correct one.
The RP44647 is free to anyone that can use it.