There are a few things to consider when planning your residential plumbing layout. You will need to think about where your fixtures and pipes will go, how much water you need, and what type of drainage system you will use.To start with, decide where you want your fixtures. Sinks, toilets, and showers should be placed near each other so that people don't have to walk very far to get from one to the next. Keep in mind that sinks require cabinets below them for storage, and that showers need plenty of space around them for people to move around in.

Well, the first thing you need to do is figure out what your plumbing needs are. Do you have a lot of bathrooms? Do you have a lot of people in your house who take showers? How many sinks do you need? Once you know your plumbing needs, you can start designing your plan. You'll want to make sure that all of your plumbing fixtures are properly placed and that there is enough water pressure for everyone in your house. You'll also want to make sure that all of your pipes are properly insulated so that they don't freeze in the winter.