I'm also curious what the height of the sink is.
A. The Kohler K-2661 height measured from top to bottom is 3 1/4 inche.
If we purchase the K-2661 how high can our countertop be? any specific height?
A. Thank you for your inquiry. The Kohler K-2661 does not a specific height requirement. You do need to keep in mind that it is an above the counter sink so it is going to be whatever height is comfortable for you.
what do I need to purchase in addition to the sink?
A. The Kohler K-2661 is just the sink. You will need a drain (K7124-A) and any vessel faucet of your choosing.
What kind of pop-up drain will this sink need?
A. You will need a pop up drain with overflow like the K-7124-A.
Will the Kohler K-2661 sink work with the Pfister GT40-DFO Kenzo faucet?
A. The Kohler K-2661 would work just fine for that sink.
Is the faucet included, if not what is the info on it? What is the recommended faucet height for this sink?
A. The Kohler K-2661 is only the sink. It's pictured with the Kohler K-14761-4. Being about 6.25" high. Any faucet with about an 8" spout height should be fine.
Would the Moen CA6600 with one or both extensions in A1717 work correctly with K-2261?
A. The Kohler K-2661 will work with the Moen CA6600.
The description says it has an overflow drain but your answer says, "You will need a pop up drain with overflow like the K-7124-A." So is a drain with overflow needed?
The Kohler K-2661 does include an overflow hole but does not include the drain assembly, so you would need a pop-up drain for a sink with an overflow hole like the K-7124-A.
What is the depth?
The K-2661 is going to have an over all depth from the the top of the edge to the bottom of the sink (bottom most portion) is going to be 6 3/4". The inside of the basin ( your water depth) is 3 1/4".
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