There are a lot of things that can cause the plumbing in the kitchen to leak. Sometimes there are just too many things that get blocked up in the sink, and it puts too much pressure on the area. The pipes and valves can also get worn away over time. Every few years, it is a good idea to take a look at the kitchen sink plumbing to make sure there is nothing that needs to be replaced or repaired. In the midst of doing kitchen remodeling, it is so much more important to double check it, too, because some things can be moved around.