A: Hi, Patty. This is not an uncommon problem, since most plumbing fixtures are installed to factory rough-in measurements.

Let me explain. When a new house is being built, the plumber runs the water and drain line while the walls are open. At that point, the plumber should have a fixture list with all the specifications as to where the pipes need to stick out of the wall. This is called the "rough-in" work.

Once the walls and or cabinets are closed in, then the plumbing fixtures are installed and hooked up to those water and drain line stubs. This is called the "finish" work. Since you have now completely changed from the style and size of your present kitchen sink, nothing will line up for the new sink -- and there's your problem.

The simple fix is to take back the deep sink and get a new kitchen sink close to the same measurements as your old sink. However, I know you are looking to install the deep sink.

In this case you will have to lower the drain line because you can't tie into a drain that is higher than the bottom of the sink. A plumber will have to "re-rough" the drain line, and that can get a little expensive. Usually the walls will have to be opened to expose the drain so it can be cut out, then the drain lines and possibly the vent line need to be altered to fit the new sink.

After all that, the wall and cabinet have to be closed back up. Finally, you can install the new deeper sink. So, basically your choice is to stay safe and stay in the shallow end of the pool, or go for it all and jump in the deep end!