I was in your same situation. Fiance really wanted one, I didn't care. We ended up deciding against it because we would have had to build out that wall because plumbing in an exterior wall requires additional insulation by code. I also didn't want it because I didn't want to use water that had been sitting in that pipe since the last time it was run. It grossed me out but it didn't seem to bother me. At least with the sink you can run the water a bit to clear that out. My solution was to get a pullout faucet for the prep sink that would reach across the aisle to the range.

I like mine (check out pics in the "brand spankin new kitchen pics" thread), and it seems to draw peoples' attention, if you're into that...could definitely live without it, but we've been using it to fill pots, soak stuff, fill the tea pot, etc., and in the scheme of things, it wasn't all that expensive...fixture + plumbing + install (in new construction) was less than 1/2 the cost of the least expensive appliance...

We have a Prep Sink and use it all the time. In our old kitchen, it wasn't the 2-cook issue at the sink, it was the 1-cook + 1-cleanup person that caused the bottlenecks! That and it seemed the sink was full of dirty dishes every time I needed the sink! In my new/current kitchen, the prep sink is in the corner of the peninsula, is on the same counter run as the cooktop, and is next to the MW and refrigerator. This makes it ideal for prepping as well as accessing it from the DR. I use it for prep the majority of the time. No, there is no disposal on it and while I wish there were, it hasn't stopped me from using it! (The only time it's a pain is when I'm peeling a large # of potatoes...but then I just use the main sink for that task.) Our main/cleanup sink is across a 6.5' aisle opposite the cooktop. It's primary use is to collect dirty dishes & be used for cleanup in general. It can also be used as an extra sink during prepping & cooking if needed...and when I had sixteen 13-yo Girl Scouts cooking in my kitchen one evening it sure came in handy! One of the best things our new layout gave us was separate zones for prepping, cooking, and cleaning up. Without a prep sink it would not have worked nearly as well.

Datura-07, from Ccoombs1's link: Do not consume water that has sat in your homeÂs plumbing for more than six hours. First, make sure to run the water until you feel the temperature change before cooking, drinking, or brushing your teeth, unless otherwise instructed by your utility. (emphasis mine) I would add, that what actually happens is that the water temperature changes twice b/f its ready to use.... I seem to recall reading somewhere that for a house w/the "average" amount of piping for water to flow through it takes somewhere b/w 1 & 2 minutes But, that was a long time ago so I may not remember correctly. I use the water temperature method. You can collect that water & use it to water plants (inside & outside)...that's what I usually do, especially in the summer when I have containers on the back deck & front porch. One thing to remember is that even if you have PVC piping, there are probably copper pipes leading into/out of your hot water tank and possibly the intake from your well or public water source. I think the person who put in a small chef's sink had a good idea. The pot filler wouldn't have to be right over it, as long as it could reach it easily it would be fine...so you get the look & functionality of a pot filler with the safety net of a drain. For leaks inside the wall...yes, there is a possibility of this and it's like a shower head that also comes directly from a wall... But, if you have access from the other side of the wall you may not have to disturb your tiled backsplash for repairs. That's assuming, of course, that your pot filler is on an inside wall. Oh! That brings up another point... If your pot filler is on an outside wall, be sure it is very well insulated to prevent the pipe from freezing & bursting! [For those of us who live in areas where we have below freezing temperatures.] BTW...it's not just pot fillers that are at-risk for overflowing...I did that once when I filled a pot next to my prep sink. The faucet head was docked on the edge of the pot to fill & I got distracted. The advantage I did have, though, is that w/the sink right there I could dump the excess water from the pot and "sweep" the overflowed water into the sink.