I am not a plumber, but find Ken Brown & Sons to be an excellent place to go for not only plumbing needs, but advice on how to do your project. While it may take a while to get a staff member to assist you (it can get pretty busy with real plumbers getting orders filled), I feel it is worth it. They have been invaluable for not only hard to find items for our old cast iron country sink, but advice on how to install everything. I have neither received bad advice, nor been sold anything I didn't need. I recommend this place to everyone, and know you'll feel much better about how to finish your project than if you had to guess what you needed at a big-box store.