Newell Gurus

The inner liner of the hose collapses and causes restriction.

I took the entire hose out and removed the quick disconnect coupling, then inspected the hose, no restriction there. I then put a bucket under the pipe where the quick disconnect connects to and turned on the water seems reasonable there.

I blew through the quick disconnect, and was not impressed with throughput. Could this be clogged?

I disassembled the faucet on-off handle, and pulled out the cartridge. Looked OK but did not dive into disassembling that one, so it is still suspect in my mind. I will call Grohe in the morning.

Don't forget that Grohe has a lifetime warranty and should send you parts for free.

I opened the shower and kitchen sink lines at the water valve manifold, and then at each device, and blew air with my portable air compressor backwards through the line. When I reconnected, I had much better water pressure, but don't feel the issue is solved. Calling Grohe tomorrow to troubleshoot and hopefully learn how to check all screens and restrictors because the ones I could find in the washer and outside faucets were clogged.

I am learning way too much about my water system...