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The Anatomy of a Sump Pump

Apr 11, 2025

By webfx

A sump pump is an essential part of a home’s plumbing system. These pumps remove groundwater from the basement to prevent flooding and protect the home’s structure and contents.

Learn more about the different parts of sump pumps to understand how they work. 

What Are Sump Pumps?

Sump pumps move accumulated water from inside a house to the outside. They are typically installed in the lowest point of the house, like the basement, and held within a dug-out pit known as the basin. Sump pumps work using a mechanism that detects water levels and pressure. When levels are too high, the pump activates and pushes water out and away from the home through a discharge pipe. 

The Parts of a Sump Pump

A sump pump consists of several parts and components that work together to remove excess water and protect your home against flooding. Some of the primary sump pump parts include: 

Float Switch

A float switch detects the water level in a sump pump. It floats within the water or on its surface, moving up or down depending on the water level. When the water rises high enough, the float switch alerts the sump pump to start discharging water out of the tank. When the water level decreases, the switch stops the pump. 

Check Valve

The check valve is a vital sump pump part usually situated within the discharge line. It prevents water from backflowing into the sump pit once the pump has expelled it. Check valves open when the pump operates and allow water to flow out through the discharge pipe. They also close when the pump stops, ensuring the water does not return. 

Discharge Pipe

The discharge pipe carries water from the sump pump to a designated drainage area. Its primary function is to direct the expelled water away from the foundation of the home, preventing flooding and water damage. 

Purchase Sump Pumps From Zoeller Pump Company

Zoeller Pump Company offers a range of high-quality sump pumps that operate efficiently and reliably to help you keep your space dry. Browse our selection of sump pumps to find the right option for your needs. If you have any questions, get in touch with our professionals and we’ll be happy to assist.