aemeijers wrote:
HeyBub wrote:
Perry Aynum wrote:
I am tiling a vanity countertop, and have a drop-in china sink. The
instructions say to set it with "sealant" which I assume means
caulk. Do I need anything else, such as adhesive, or are the
plumbing connections enough to hold it in place?

Adhesive is insufficient. There should be some method for a
mechanical connection to the countertop, typically clamping devices
securing the sink from underneath.


'Should be' and 'is current common practice' are not always the same
thing. The cheap builder-grade drop-ins I have seen lately have no
doohickeys on the bottom to mate with the clamps. The ring of putty or
caulk, and the downforce of the drain trap, are all that holds them in
place. The one in my bathroom is sorta floating right now- I popped
the caulk loose changing the trap, and never bothered to redo it.

Maybe somebody makes a gigantic C-shaped spring steel thing that you
put the drain tail through, that presses up against bottom of counter?

Excellent idea, but I'm beginning to think there are ways, they're just
secret!

I asked here about a year ago how to attach a sink given that all it had was
an upside-down U-channel and nobody could figure out how to anchor the sink.
But I found it.

Imagine a flat strip of metal that you bend into a U about 3/8" wide. Now
take the upper legs of the U and fold them over inwards. Then weld the U
thingy to the sink. That's what I had.

As it turns out...

The distance between the folded over strips would exactly permit the
introduction of the head of an 8-32 machine bolt, its head held in place by
the gap between the folded over parts and the bottom of the U.

Once that scheme was discovered, the rest was easy and consisted of a flat
piece of metal with a hole for the bolt and a nut.

I can now heave large - even huge - bits of food into the sink without a
care whether the sink will move. Heck, I can toss in a whole critter!