I just found a thread from 2011 concerning a similar problem with a Moen faucet. The OP contacted Moen and they sent her a new part. Apparently Hansgrohe is closed on Saturday so I will try again Monday. In the meantime I guess I need to find some suitable tape as a short-term stopgap.

homepro01, good advice about turning the water off under the sink overnight.

I can't even talk to Hansgrohe till Monday, so I bit the bullet and ordered the hose from Amazon Prime with guaranteed delivery on Monday. Yes, it's $38 + CA tax, but this is my only water in the kitchen. I plan to call Hansgrohe anyway, so if I end up with two hoses, fine.

I tried Rescue Tape and that didn't help. Clearly the real leak isn't in the braided hose cover but underneath, so the Rescue Tape didn't seal anything, just moved the water out the ends of the wrap making it worse. I'm better off with the leak confined to one spot. I've wrapped a dish towel around it to mute the squirt.

I found a YouTube video for replacing the hose and it seems really easy, so hopefully I can get myself out of this fix without much effort.

I doubt there is any tape that will stop the leak, even temporarily. Just 'contain' the leak as much as possible and wait for the replacement hose. Water pressure coming through a very small 'outlet' will cut through steel. You probably have a pin-hole size leak or a very small tear in the flex hose.

new-beginning, yep. I cut the Rescue Tape off--interesting stuff--and tried some duct tape, but similar results. Containing it is possible for a couple of days.

There is nothing we quite take for granted like water when we want it.

This happened to my Talis-C, at around the year mark. I called Hansgroh, they replaced it at no charge.

aamassther, as much as I hate to pay Amazon when Hansgrohe will replace at no charge, it's worth it to me to get it at least 2 days earlier. But I'm not gonna tell Hansgrohe that. :)

Maybe you should tell them--let's see how good they really are!

Maybe I will. :p

Update:

I received the part from Amazon and replaced it myself. I placed the order at 4pm on Saturday and received it at 2pm today (Monday). Prime, 2-day guaranteed, free, via USPS. While it only had to come from Las Vegas to the Bay Area, I think that's mighty good service.

I talked to Hansgrohe today, but I had no opportunity to elaborate. Their procedure was to send me an email where I filled out basic info, plus two photos at their request: the faucet and the area with the leak. Less than an hour later I received a reply that they will ship me a new part on Tuesday (which I probably won't receive till Friday, I'm guessing).

It's a good thing I watched a video that explained how to replace the hose. Nothing could be simpler, right? The "instructions" that came with the part were not helpful at all, just drawings with arrows.

The hardest thing I've ever had to do was to thread that hose back down through that high arc faucet. God knows what else is down there, but it took me over half an hour of up down, wiggle, curse before it emerged under the sink. It was like intubating a giraffe with a crooked neck. I don't look forward to ever having to do that again.

The faucet works like a champ and I'm back in business again. I put a towel down before I started undoing things and there was a small amount of damp when I was done. I'm hoping it was just residual water left in the old hose that came out when I disconnected it. I ran the water with a dry towel there and everything seems dry. I'll keep an eye on things for a few days

Great job! It is annoying when you have to fix something, but doesn't it feel good to have solved the problem yourself? And yes, YouTube has been extremely helpful in filling in the gaps left by terrible instructions!

Lisa, thanks. Yes, it feels great to solve a problem by myself. The $41 I paid to Amazon is negligible when we're talking my only source of water in the kitchen.

The Youtube is so clear and simple to follow. The illustrated instructions were horrible. You had to already know what to do for them to even begin to make sense, and even then they were horrible.

I hope I never have to feed a hose through a high arc faucet again. It defied logic. I wish I could have seen what else was in there. I kept promising myself a stiff drink when it was done, but it was too early in the afternoon for that. :)

Isn't it amazing how easy everything always looks in videos?

Good for you, Linelle. Those few words about "it may get caught, so please be patient" would have been enough to chill my blood if I were planning to do that.

Writersblock, yes, I was prepared to be patient feeding the hose. I thought, how hard can it be? Just don't ram it in. It was like meeting total blockages at various points. The weight of the hose made it want to back out, so I couldn't just leave it and walk away or I'd lose the progress I made. The only thing that worked in the end was to slowly swivel the arc back and forth as I patiently pushed and waited.

No extra damp since yesterday. I suspect it was water in the hose when I disconnected the old one.

I did get cheek to cheek with my garbage disposal, having to hug it get my arms around it to access hose joins and reattach The Weight. Happily, it did not smell bad.