You can use a graph paper for it

Standing Bathroom Furniture

The pipes are available in various sizes and if you are using a single drainage pipe, you should know how many fixtures are connected to it.

You can use a graph paper for it. This step is very helpful as you can easily understand through it whether the fixtures will fit in the respective areas or not.
Another thing to be aware of is the drainage pipe for each of the fixtures. 

If the walls of the bathroom are not in good condition, you should first reconstruct the wall so that you can go ahead with the plumbing. It is a complicated process and if you are unsure about it, you need to seek assistance from a professional. The water inlets should be installed at height to avoid compliance issues.

First of all, you need to measure the space of your bathroom. You need to draw your bathroom and put all the fixtures you have thought of so that you know where plumbing is required. A lot of people pay attention to the design of the bathroom but neglect plumbing. Through plumbing codes, you can understand the correct size. You need to make a rough drawing of your bathroom with accurate measurements. Otherwise, you can also use a computer program. These drainage Standing Bathroom Furniture pipes connect to the septic tank. Here are some tips on how to plan the plumbing of your bathroom:

This will also help you understand that after installing the fixtures, you will have enough room for moving around in the bathroom. For toilets, you only need to install supply cold water. For bathtubs and sinks, you can install two supplies for hot and cold water. Through plumbing codes, you can understand where exactly you need to install the water inlets. Do you wish to have two sinks? Do you want to install a bathtub or a shower? Or do you want to make your bathroom as combo room for bath along with a sink and toilet.Whether you are making a new bathroom or reconstructing your old bathroom, it is very important to have a proper plan. After you have installed the waste pipes, you need to ensure they are properly vented so that harmful septic tank gases do not come inside your living room. After you are pretty sure about the fixtures and its placements, you will be able to understand the requirements for plumbing. You should have a proper look at the bathroom so that you know how many fixtures you would like to have in the bathroom. The size of the vent pipe depends on how many waste pipes are installed and their size and also on the basis of the distance between the waste pipe and vent pipe