Plumbing Drainage System

All You Need to Know About a Plumbing Drainage System

 Overview: Learn about the different types of plumbing drainage systems and find out how they work .

When we hear the word plumbing drainage system, we might likely focus on the toilet, sink, showers, and everything we use in the bathroom or kitchen.

While none of that is wrong, there is much more to a plumbing drainage system than the appliances we use.

Brief Introduction to Our Plumbing Drainage System:

The plumbing drainage system in your house is helpful in a number of ways. From carrying water to throwing waste and supplying air to the congested pipes, these systems are connected to a long series of lines with two uses — the first use is for us and the second use is for the sewage system.

However, there are different types of plumbing drainage systems for different uses that we’ll consider for more clarity


Broadly speaking, a plumbing drainage system has four different categories: 1) sanitary, 2) surface, 3) potable, and 4) storm water drainage. Each method has its distinctive functions, so let’s take an in-depth look into how each system works.

 Sanitary Drainage System: 

A sanitary drainage system helps us get rid of the wastewater that causes odor. This drainage system contains a series of pipes designed to dispose of the water correctly.

This wastewater comes after doing laundry or dish washing when the crumbs of food  or lint go down in the drain. The sanitary system excretes the waste and transfers it to the local sewer system.

 Surface Drainage System: 

If your area is flat, surface drainage is a necessity for you. Surface drainage system requires ditches that are dug in a parallel pattern and are relatively shallow to act as canals for the run-off water.

These ditches direct the water into the primary drain and away from your home to avoid water flooding in unwanted areas.

In flat areas with a lot of hail, water pooling may cause many problems if no proper drainage is instilled. This can be done around the building, driveways, commercial or residential areas, and walkways to keep the water away from the focal structures.

 Storm Water Drainage System: 

Have you ever noticed the holes on the sidewalk where the curb meets the street? Those are the storm drains that are used to carry excess water away from your house to keep it moist-free.

Previously, the water would go down a storm drain into the sanitary drainage system – they function the same in some areas; however, rainwater slips to the storm sewer with advancement.

The gutters at your house also play a vital role in draining rainwater. But if they aren’t seriously maintained, it will lead to severe issues.

How do I know that my gutter is malfunctioning?

  • The gutters are split.

  • The paint starts sticking off the walls.

  • Your home faces continual water damage.

 Potable Water System: 

The final ptype of plumbing drainage system is a potable water system that is comprised of various pipes connected to a single system. This system enables the users to use water within a building. Valves are located on the system and are used to cut off the water supply. Additionally, a meter is installed to dictate the amount of water being used in the entire building.


While plumbing may seem boring, there are small technicalities that we aren’t always aware of that keep your home or building int act.

If you find your drains having issues, don’t worry, a well-equipped and qualified plumber can help you. Contact us if you want to fix your pipes!

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