Have you contacted delta during all this?

What does your plumber say? I'd get the current problem diagnosed before deciding. I can't tell whether you need a new faucet from what you describe.

I called them when I was trying to fix the leak myself. They said the model had been discontinued, but sent me a PDF of the diagram of the faucet. The Bellini in the link above must have been added more recently.

What does your plumber say?

I guess I'll have to check with him first. I'm just afraid he'll start taking things apart and then announce that I need a new faucet. But there's no point in getting one if it's not needed.

Our last faucet lasted about 35 years. I'm quite sure it was a builder's special put in with the house. The leak that developed was a pinhole in the top of the arm that was caused by 35 years of water thinning the metal in that spot.

Your leak(s) are totally different. I have a hard time imagining how water runs from the plumbing at the back of the sink around to the front of the sink. Is this an undermount? If so is the reveal positive (little bit of sink shows beyond the edge of the counter)? Is there water leaking into the base cab? It would be a simple matter to just change out the faucet, but it would be good to know how the water is getting from the water lines around to the front of the sink. Definitely time to get the plumber out.

Delta has a guarantee for the original consumer purchaser for as long as the original consumer purchaser owns their home. Sorry for the leagalize but I'm reading from their published warranty information. They will replace, FREE OF CHARGE during their warranty period.
Funny that I saw your post and was actually researching my warranty on my Delta faucet that's only 2 years old. I'm having problems with the finish. Good Luck!
Here's a link that may be useful: http://www.deltafaucet.com/customersupport/warranty.html

I have a hard time imagining how water runs from the plumbing at the back of the sink around to the front of the sink. Is this an undermount?

Suzanne, I have a hard time imagining that myself. Really--I don't know how it could happen without water dripping into the cabinet underneath, and it doesn't appear to be doing that. No, my sink isn't an undermount. It's possible I'm mistaken about the traveling water, but here's what I've observed. I have a rolled-up microfiber cloth between the faucet and the backsplash. When water has appeared at the front edge of the sink, I've checked and found the cloth saturated. This has happened several times. I've used a cloth or paper towel to blot the water at the front of the sink, and sometimes the seepage keeps coming.

Sanjuangirl, thanks--that was helpful. I read the link, which says they'll replace "all defective parts and even finish." So I guess my plumber will have to determine which parts are defective.

alisande, yes you do need to know which part or parts are defective so you should have a plumber look at it.

Our Delta in the previous home developed a leak and when the plumber came to fix it he's the one that told me Delta has a lifetime warranty and that I just needed to call them. So I did it while he was still there and he told them what part was defective, then they sent it free of charge and it came a few days later. Best to do that with a slow leak that you can put a pot or something under while waiting for the new part though -- and you may not have that luxury from the sounds of it as it took a few days to arrive via courier.

In any case, plumber is first order of business, and if he thinks he can fix it enough to hold on for the new part then calling Delta together with him is a good idea. Worked for me anyway, and was safer than me trying to explain what part I needed myself. :)

They may replace the entire faucet. It's worth a shot.:)

I purchased the Delta "Waterfall" faucet back in December of 1995. It looks a LOT like the link you posted. It started leaking around the base after a few years and then the handle later on. I think it's just some design flaw of this faucet and I would not buy another one.

Here is the Waterfall linked below.

Here is a link that might be useful:

Taggie, good plan--thanks!

Kompy, that's my faucet! I'd forgotten it was called a Waterfall. Sounds like you and I have had the same experience with it. Have you replaced yours? What did you get?

I wonder if they solved the design flaw when they came out with the Bellini.......?

Go to Home Depot and buy a new one and have them install it. I had the same situation three times in eleven years. I paid a plumber $80 to tell me I needed a new faucet. Buy a new one for $80 and pay $80 to have it installed. You will save yourself a lot of time and aggravation.