One of mine does that! It pops less if you move the stream of water all over the bottom to gradually heat the entire sink instead of just one spot...I don't mean it pops "less"; I mean it's less likely to pop. As you know, there is no half pop. :)

I don't know if it will affect your sink install over time (mine is welded in). It IS a pretty violent pop. Hope some counter guys can help you with that.

Good idea to disperse the hot water. I'll try that. I could drain into a bowl then add cold water and tip out, but that may get old after awhile. I do love the big sink, and read this is because more sink bottom to pop than a double bowl sink.

I doubt this popping is hurting anything, but I'd want my disposal flange set in silicone, not plumber's putty.

If you've got a Silegranit or Corian (acrylic) sink, you better hit the disposal hole with the hot water.

Joseph, that is great advice. Many sinks can be damaged by boiling hot water. I have actually heard from several people about damaging their imported copper sinks with hot water. I was not aware of that issue with the manmade granite sinks. Good to know! Question to you... what is the negative issue with plumbers putty?

Nicci, I guess you should just check the seals periodically and try to get visitors to dump the boiling water. I love making people with a pot of doom jump!

It does bug me a little because you know it's coming but you don't know exactly when...POP.

My single bowl big stainless steel sink will pop when I pour the pasta water in the sink too. Scared the heck out of me. I know it's coming now. I turn the hot water on in the sink before and use my sprayer to get the whole bottom warm then pour as straight into the drain as possible. It helps.

Hi . Would be interested to know what make/model your sink is. Wondering if handmade or deep drawn. Thanks!

Thanks for all the replies. It's an Elkay sink - I'll have to check model.

I hope silicone was used around disposal drain, I'll check seals regularly to keep an eye on things. I hadn't though to warm up the sink first, so I may try that or drain into a pot sitting g in sink them add cold water before tip it out. A couple of times the pop has been loud - I wonder if drain in back right corner adds to this as more surface to"pop" ?

My drain is center back. And I do have a full sink grid. I definitely have seen the bottom move when it pops. I had thought about the disposal connection after it happened repeatedly. I don't cook pasta that often lol. Mine is under mount, not farm sink. I swear I can't remember the brand I had my granite guy order it for me.

Hi . Are your sinks- the ones that pop- more rounded in the corners like these-

2318 Single Bowl Stainless Steel Kitchen Sink, 18-Gauge, Sink Only · More Info

3120D Kitchen Sink, 18-Gauge, Sink Only · More Info

Reality Sink · More Info

FWIW, my copper sink has never "popped", and I've poured plenty of just-off-the-boil pasta water down the drain. (Apron front, undermount, 42", square corners)

Mine is tight radius corners.

Mine has slightly rounded corners, and drain is back right.

Mine is made by a local guy with fairly small radius corners. Drain is in the back corner. It's fairly large, maybe 33" or so.

Seems to be a mix of hand made/deep drawn , which leads me to think the uneven drainage slope required to off set the drain may be part of the causation. Thanks for the feedback everyone!

I have a TopZero sink. Started the popping sound. Later, the bonding material they use started separating and breaking off. I am convinced it is separating due to the thermal expansion. I am just a customer. I can't seem to get or find an answer. Can anybody help with this question?

HU:

I am an authorized TZ installer. When you say the bonding material is separating, are you talking about the bond between the outside of the sink flange and the inside of the top cutout? If so, the sink will have to be dropped and remounted. I just had this callback, but of course not on one of my installations.

I have assumed that all along, but no one wants to admit it or do anything about it. Apparently, being patient for 4 months doesn't count when you finally lose it. Thank you so much for the validation.

Where are you located?

HU-185109297

So, would you recommend a Top Zero sink? I would appreciate hearing the reasons that you have. thanks.

My daughter is having the same problem with her new stainless steel sink. It has the drain in the middle back end and is not the rounded style. Whenever you drain pasta water it makes a loud pop. She has had a plumber out twice to repair as the pop causes the drain pipe to leak. She has water damage under her sink as she wasn't aware this was happening till the damage was done. Personally I think the gauge of this metal sink is the problem as I have a stainless steel sink and have been dumping pasta water in mine for years without issue.