I don't know about the current iteration, but with the old domsjo (it got a bit of a redesign for Sektion) you could use any disposal that would fit. Most problems came from overtightening, but you've already ruled that out. But still I think that probably most customers in the US who buy these sinks do install a disposal, so maybe you've just hit a bad batch at your local store.

Thanks for the feedback, it is good to know others are using disposals with no issue. I am by the way, using the newer version of the sink with Section cabinets (which my wife really loves). I am using an Insiknerator Badger disposal and thought maybe it was putting too much torque on the sink. Thought about trying another disposal that was a little higher quality but they seem to be even bigger. If no one else is having an issue i will just try another sink and take great care to install dead center in the drain and make sure i do not over tighten it (may try silicon instead of plumbers putty and that way I can tighten less but ensure no leaks.

It will be interesting to see if Ikea has an issue with me returning a second sink!

I don't know if this is true or not, but I was told that if I wanted to use a disposal with my (soapstone) sink that I should use a higher end one because they don't vibrate as much. Needless to say, I am nervous about installing a disposal, but really don't want to live without one.

Thanks Sherri, That is an interesting point. The one I have is a few years old and lower end, with the new sink I may just break down and buy a better quality one, install with silicon so I don't have to tighten as much and hope for the best. If the third one cracks I may have to go with a stainless apron front kohler sink as that is all I can find that would come close to fitting the existing cutout.

We have the domsjo and I think it really differs based upon the particular sink you get. Luck of the draw. We didn't install a disposal because I had read of others with your issue. I know ours is a little off because the sink trap specifically sold for that sink didn't fit during install, so I'm guessing a disposal would crack it immediately. I hope if you try it again that you get one that doesn't crack!

I've set disposal flanges with silicone for years. No leaks, no callbacks, no cracked sinks.

You should get a nice bead of squeeze-out when you snug it. Squirt the squeeze-out with Windex and clean it off with a wet finger. A little acetone on a paper towel will remove any smears.

Zsalmon: any updates on your third sink? I'm thinking of getting the Domsjo sink but am unsure because of the issue with cracks...

No updates. We had some family move in with us for a few months so i have not replaced it yet. I plan to replace it in the next two weeks and will also change out the disposal to the smallest I can find (will also use silicon as noted above). It will be interesting to see if the replacement sink is made any differently. I will update here once I have more info......

will also change out the disposal to the smallest I can find

I think that will still be the badger, FWIW.

UPdate: Wife picked up a new sink yesterday and we also picked up the smallest disposal I could find (badger 1/3 hp which to be honest is not much lighter than the 1/2hp). My wife talked to the guy in the kitchen area and he said to use the smallest disposal to avoid cracking the sink - it really seemed like he knew there was an issue. Unboxed the sink and could tell right away there was a major design change - more re-enforced around the sink openings and the bottom of sink is much flatter (so flat it lets a little water sit there after draining). I used silicon this time around the flanges and did not over tighten, then let the silicon dry before installing the drain and disposal. I will see if I can upload photos to show the difference in the sinks an will update here if I see any cracks.....good news is this morning it was fine. The last one had cracked by the next morning.

Maybe Ikea has fixed the issue - time will tell......

Old sink (you can see the crack if you look closely.....

What a difference! Thx so much for the updates!

Forgot to mention the new one seemed heavier although we did not weigh it. Also, I did make one mod before installing. The sink normally is held only by the two sides of the countertops (in my case oak countertops). I added board along the wall (even with the countertops) to help support the back better. Guess I should have taken a photo of that too as I think it really supports the back of the sink well. I could not figure out a way to support the front easily. When you really think about the mass of these sinks your really wonder if they are pushing it by spanning 36 inches with no support.

Hi everyone, I have to comment - I too had TWO Domsjo sinks crack. (Double 36 inch). The first crack appeared randomly at the bottom right corner, about 5 inches and a hairline. I did absolutely nothing to create this and was mortified. Luckily after the heavy lifting - 1,5 drive to IKEA they did replace it. Second sink arrived, boom one week in and I suddenly had a massive crack from the faucet to the right sink drain hole. My heart sunk. We really think we did not over-thighten this faucet (we think, but I suppose that area is very thin and very delicate). Today we got our third sink. I love the look of this sink and we designed our kitchen for this to be main view... I am terrified that it will crack again. I am happy to know I am not the only one. I have to say, that this new sink has a minor imperfection (read crack) on the other side/facing the cupboard). What to do, Ikea is 1,5hrs driving and I do not want to lift this heavy beast one more time. I hope we are lucky now, I am going to continue to be extremely careful when I use it. Which is a shame because it is a sink, and a sink should be able to handle some beating (you know, dishes etc). Thanks for reading my blurb, not sure if I would recommend this sink to anyone.

Take lots of pictures showing the defects of the brand new sink with the date. Install it with the sink support system Joe recommends. I personally would not be using one after reading up on all the defects and cracking.

Yes, we are going to add the runner. and I will take pictures with the date. I now doubt my choice as well, I didn't look into other sink option this time, but I am delighted going to check it out. I rather would have paid more for a better product, I didnt realize these issues before I bought it. I am learning a lot.

It cost a bit more (OK a lot more) but it will never crack on you - the Kohler Whitehaven apron front sink. The "short apron" style can be installed on a standard sink base. It is undermount, so needs a countertop that can work with undermount and someone like Joe to come and install it for you. I had to save up extra months for the Whitehaven (I considered the Domsjo) but this sink is going to outlast my fridge and work just as hard - I guess I don't mind spending some $$ for it:)

How is the new sink? We had an old version for the Sekton cabinets that cracked. I just got a new version but I am afraid to install a garbage disposal for fear it will crack as well. I am curious as to how the new sink is holding up and what garbage disposal you used.

Garbage disposal flanges cracking sinks are installer, not manufacturer, error. Snug the bolts just enough to get putty squeeze-out, prevent any leaks, then stop.

We purchased our Domsjo in April, 2017 and installed in our beautifully remodeled kitchen with quartz countertop. Out of the blue, with nothing dropped in it and not on the disposal side, the sink is CRACKED!!! It is not incredibly noticeable at this point and we are wondering if we can seal it. Any other option would require new countertop!!

It does not require a new countertop, however, a custom stainless steel sink may be needed. No, there is no sealing it.

Same as all of the rest. Our Domsjo has a large crack in the bowl on the right. Our disposal is on the left. Can't fix. They don't make them anymore. It's an odd sink, so when it was installed there is no counter top in between the cabinets, so it looks like only a custom sink will work. My first quote for a similar style of stainless was $4500!