3 Types of Sanitary Drainage Systems

Drainage is something most people don't think much about. They see drains in different places and possibly assume they are all the same, but that’s not the case. 

The reality is that there are three main types of systems: stormwater sewers, sanitary sewers, and combined sewers. 

Although they’re all different, they share the same base function of taking wastewater away from one location and transporting it to another.

Let’s dive in!

What is a Sanitary Drainage System?


The purpose of a sanitary drainage system is to safely remove contaminated wastewater. They consist of pipes, sometimes called laterals, that are attached to homes, businesses, and buildings. The main sewer lines transport the wastewater from the laterals to wastewater treatment plants to get processed. There, the wastewater undergoes a treatment process that cleans and purifies the water before releasing it back into the local waterways. 

These systems aim to transport this wastewater to the wastewater treatment plants without pipes leaking or overflowing from manholes (an event known as Sanitary Sewer Overflow, or SSO).

3 Types of Sanitary Drainage Systems

You can find sanitary drainage systems in many places and forms. You can find them in bathrooms, your kitchen, and even your laundry room, connected directly to the sanitary sewage line.

In these places, toilets, sinks, bathtubs and showers, washing machines, dishwashers, and garbage disposal are directly connected to the sewage system. That means when you flush the toilet or the dishwasher drains, that wastewater goes through the pipes to the treatment plant. 

Sanitary drains in these situations help ensure that wastewater gets transported safely to treatment plants. While sinks, bathtubs, showers, etc., connect directly to the sanitary sewage line, relying solely on these pipes to handle wastewater isn't always a good idea.


Pipes can fail which can lead to a big mess; systems like Slot Drain's 2,000 Series or 4,000 Series drainage system can offer more effective drainage for showers, bathtubs, and laundry rooms. They can also help protect bathrooms and laundry rooms from potential overflow of the toilet or bathtub or even a broken pipe spilling water everywhere.

Like residential properties, commercial properties can have many of the same connections in larger quantities. They can also connect to commercial kitchen equipment and specialty fixtures like the hair washing stations in salons or dental sinks. In these locations, floor drainage, like a Slot Drain, can be essential.

Not only can it help protect from overflowing sinks and busted pipes, it can also protect against liquid spills by helping to clean up cleaning chemicals, shampoos, and other liquid products quickly. With all the water that these practices use, a 4,000 Series Slot Drain is vital to help clean up spills and ensure floors stay dry, in order to minimize the risk of bacteria growth and pest infestations in commercial kitchens and restaurants.

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Hospitals, food processing plants, and farms also need sanitary drainage and can benefit from systems like the Slot Drain. These are places that are expected to maintain high levels of cleanliness. In these places, heavy-duty options like the 10,000 Series Slot Drain provide sufficient sanitary drainage and the strength to withstand heavy loads.

Why Slot Drain?

The Slot Drain is one of the best systems you can find that is efficient, sanitary, and easy to maintain. Unlike a traditional trench drain, the Slot Drain has a slim opening that doesn't require any drain cover. Slot Drain uses T304 and T3166 stainless steel to create a seamless pre-assembled and pre-sloped body for easy installation. 

The stainless steel construction makes for a highly durable system that can range from Load Class A to Load Class E, which makes it an excellent choice for any setting. Stainless steel is also corrosion and bacteria-resistant, which is why it is favored for various types of sanitary drainage systems. The seamless design of the Slot Drain also adds to the hygienic nature of the system by eliminating the possibility of bacteria clinging to the seams.

The Slot Drain is easy to maintain; the open design eliminates the need to deal with a drain cover which makes cleaning by hand much easier. There is also Flush Flo and Clean in Place (CIP) technology, which allows for semi- to fully automated cleaning and sanitizing.

Meeting Sanitary Needs

Sanitary drainage is everywhere you look, even if you may not see it. Drainage systems are vital for managing wastewater and transporting it to water treatment plants to get clean and purified. While the systems in place are effective, having additional sanitary drainage is extremely beneficial, and the Slot Drain floor drain system is the perfect solution. Slot Drain systems are effective and unobtrusive and help to maintain sanitary conditions by eliminating standing water and reducing the risk of bacteria growth.

Contact Slot Drain today to learn more about the types of sanitary drainage systems they offer and how they can make a difference!