Elkay undermount sink, what disposer flange works with it?

[Terry]

I was getting ready to hook up a customers Elkay undermount today with a nice 3/4 HP Insinkerator using the supplied black matt flange, to match the black matt kitchen faucet they had too. Sink looks like this in the catalog.

But what is this I'm looking at? Doesn't that seem really, really deep for a flange?

The flange doesn't drop into the provided hole.

And it barely protrudes through the bottom.

The standard flange for the disposer is 4-1/2" across.

But the sink is made for a drain that is 4-1/8" across.

So this is going to get interesting when I tell the general and the homeowner that we have a little math issue.
This is what came with the sink. Any ideas?

Elkay Quartz Luxe® 35-7/8" x 19" x 9" Single Bowl Undermount Kitchen Sink with Perfect Drain® Caviar

Made of hard, natural quartz sand particles and high-performance UV-stable acrylic resins, Elkay Quartz Luxe® kitchen, prep/bar and laundry sinks are exceptionally durable and silky smooth. This makeup creates a hygienic, nonporous surface that resists germs. The composite sink comes in popular...

www.elkay.com

 

[Breplum]

You don't use the ISE flange.
You need the Elkay LKPDQ1 drain assembly. Usually they are included, but maybe only certain models.
In that assembly, there is a Elkay flange part that has an ISE bead on the bottom, so that is what you use the ISE bottom half with.
see: http://www.elkayfiles.com/care-cleaning-install-warranty-sheets/74180289_disposer.pdf

 

[Sponsor]

 

[Terry]

You don't use the ISE flange.
You need the Elkay LKPDQ1 drain assembly. Usually they are included, but maybe only certain models.
In that assembly, there is a Elkay flange part that has an ISE bead on the bottom, so that is what you use the ISE bottom half with.
see: http://www.elkayfiles.com/care-cleaning-install-warranty-sheets/74180289_disposer.pdf

Have you done one? I have the part you mentioned, and I don't see it doing anything like that.

 

[John Gayewski]

I think they call it "the perfect drain system."

The sink has a retaining groove for the disposer built into it.

 

[John Gayewski]

Have you done one? I have the part you mentioned, and I don't see it doing anything like that.

 

[Terry]

Going to the job today, more pictures after looking at the video to come. It might happen.

 

[Terry]

At first the drain assembly didn't come all the way apart. It took some fiddling with it. There "are" more parts to it than what my first take at it displayed. Here are the parts laid out

Okay, there is the cup with the groove, which had been hidden in the bigger cup.

Yep, there is a groove here. Groovy.

Here is sets in the sink hole.

The disposer is attached.

Throw in the baffle.

I'm here to finish a job that a different company started. The home was built in 1975 when the deepest sink was 8"
Today that makes for an interesting connection for a disposal. I reversed the trap on this to make it fit. I wish somebody would come out with an improved design for all the deep sinks on old roughs. They could cut 1" of height off the end and it would be a huge help to us plumbers in the field doing service work on someone else's new remodeled kitchen. The cabinets come in, and hey! Can you hook this mess up?

And yes, I mentioned that it was a used disposal, or at least a couple of years old.

 

[Jeff H Young]

I don't like that . sink is deep already and then the drain drops another 1 1/2 " . too bad they didn't lower the trap arm it appears higher than disposal 90 . but its on them for having it plumbed by others and not opening the wall