Yes, you can use flexible pipe for a sink drain. Flexible pipes can make it easier to fit sink plumbing together with less measuring and fewer cuts. However, corrugated flexible pipe can trap hair, grease, and food particles in the folds and cause foul odors and eventually build up enough to clog the drain. Smooth pipes are recommended for sink drains and plumbing.

Yes, there are different size sink drains, but a 1 ½-inch-diameter drain is the most common modern drain size. However, some sink drains are 2 inches or 3 inches in diameter. A bathroom sink drain is 1 ¼ inches in diameter, and kitchen sink drainpipes are 1 ½ inches in diameter.

Whether a pot filler is worth it depends on your cooking habits, budget, and kitchen layout. For avid home cooks who frequently prepare pasta, soups, or stocks, the convenience of filling large pots directly on the stove can be a significant benefit. A pot filler can also add value to a home, attracting potential buyers with its combination of luxury and utility. However, the installation can cost around $800. The return on this investment is highest in larger kitchens where the sink is far from the stove. In smaller kitchens, where the sink is nearby, a pot filler might be perceived as an unnecessary feature by some homeowners or potential buyers.

No, you don’t need to use plumber’s putty to install a sink drain. Other options are available, such as silicone putty or silicone caulk. Plumber’s putty is the traditional method and it’s easier to work with and easier to remove. It doesn’t need to dry before using. Silicone putty should dry before you use the drain.