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Building a Home Other Design Dilemma

Water stain under mount SS sink

10 months ago

What is the cause of the stain?

Hello!

I need help…i just noticed that i got this stain on my sink when i was cleaning the cabinet under my kitchen sink…i am showing a photo of the part of my under mount stainless steel sink from Amerisink.

I want to know what is the cause of the problem ibefore i call a plumber. is there a leak on my kitchen faucet? or maybe its a defectice sink? or it was not sealed properly when it was installed.

i would appreciate it if someone can tell me what the problem is.

Thank You!

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Comments (11)

PRO
Joseph Corlett, LLC
10 months ago
What are we looking at please? The picture doesn't have any context.
PRO
JAN MOYER
10 months ago
last modified: 10 months ago
As above......we're looking at the bottom of the sink? Do you have water in/on the cabinet floor? Moisture in the cabinet floor? Do you see any surface damage to the sink from above at counter level?

If anything were leaking, there would likely be water. Whether sink, faucet, connections, the dishwasher hoses....SOMETHING.

Amerisink is a lower end sink...but seems a crack would be visible or felt, from above.
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In no particular order: Check each supply connection again, carefully with a flashlight. Check both when you run it and when it's off. Pull out the faucet and run it - could be leaking on that end. Check the compression nut of each shut-off valve, if there's even a single drop forming, then get two wrenches to snug it up a bit more (hold with one wrench, turn with the other) (that's the nut that connects it to the supply pipe. Check the stem of each supply valve, if there's a drip, you can tighten the cap nut (nut under the handle) just a bit. BTW, if they are old "multi-turn" valves that happen to be leaking, then replace them with "1/4 turn" valves instead (much better).
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I love, love, love my sink. Probably one of my top 2 favorite things in our new kitchen. The finish is great, not brushed but not super high shine and it has been very easy to keep clean. We've had it installed since last June and no scratches yet...probably helps that we keep the grid in all the time and I only use the sponge side of the scrubbie to clean it...usually just clean it with dish soap or 409 but maybe once a month I use the liquid Bar Keeper's Friend and it has stayed looking brand new. I was a little worried about the soundproofing only because of it being deeper than our previous sink but it hasn't been an issue at all.
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Comments (1)
Looks like it may have wicked up from the bottom. Did you check for drips with water running through all the pipes? And nothing was spilled in the cabinet? Is that dust on the trap connection (on the left) or mineral build-up? If mineral, water was leaking there. Is that stain on the right rear bottom, or shadow? If stain, the leak is over or from one of those 2 pipes there. Check your caulking along the back of your counter there, also the caulking of the sink. Another source could be the drain pipe behind the cabinet. Can you see the area from below (like, is your basement ceiling open to the floor above?) I would check for signs of water there because if the water is coming from behind the cabinet (from failed caulk or the pipe) it might also show on the flooring/ceiling.
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Just today we have a thread about Joseph Corelett doing just that. He did this as part of a repair. https://www.houzz.com/discussions/rod-repair-extraordinaire-dsvw-vd~5644682?n=13
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PRO
Patricia Colwell Consulting
10 months ago
I have no idea what you are showing. Is this the sink from inside the cabinet?
Jennifer Hogan
10 months ago
No one can see anything from the photo, but if you want to know where the leak is coming from tape some paper towels at different locations, wash some dishes, use the sink and then check the paper towels to see where the leak is coming from.
PRO
Mark Bischak, Architect
10 months ago
last modified: 10 months ago
The picture looks better if it is turned vertically. Can't make out what it is, but it looks better that way.
R P
Original Author
10 months ago
Thank all for your comments. My apologies for sending a very confusing and lousy photo. I am sending again a couple of photos.

Whoever did the plumming (this is a brand new kitchen counter), probably doesnt know what he was doing. i am afraid its a serious issue. its still under warranty … should i demand for a brand new sink? Since this is an undermount sink, do they

have to change the quartz counter too of the island?
R P
Original Author
10 months ago
last modified: 10 months ago
By the way, the kitchen faucet gets loose and have to be tighten every now and then. Maybe it leaks when the faucet is loose
latifolia
10 months ago
A loose kitchen - just when you think you've heard it all!
R P
Original Author
10 months ago
Thank you, Latifolia for calling me out regarding my mistake. I was in a hurry and didn’t have time to double check my message. Wishing you a happy weekend.
PRO
JAN MOYER
10 months ago
last modified: 10 months ago
I repeat...........

Is there any water down below IN the sink cabinet?

Truthfully, I still can't really tell what is going on- if that is a water line stain and the silicone has gaps at the counter level, it could be that. Again.... it could be minor unless you see WATER or moisture and if the faucet "needs tightening" call back whomever installed it. For all we know, it's much ado about nothing. What brand is the faucet, where was it purchased etc? What part is loose, handle or base of faucet at counter level.

There are no mind readers here, and no...none of these issues have any affect on your counter tops.

Basically? Your best bet is call the plumber on the whole thing. If the under mount sink has no strap beneath? Have him address that as well.
PRO
Joseph Corlett, LLC
10 months ago
Let's see how the sink is attatched to the countertop please; take a shot standing back far enough that we can see the countertop on both sided and all of the drawer in the front also.

That doesn't look like a leak to me.

Can you slide a steak knife between the sink flange and the bottom of the stone? Try a few places please.

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