What Is a Sewage Ejector Pump? A Beginner’s Guide

1. Why a Sewage Ejector Pump Is Required

This pump is necessary in buildings where wastewater must be lifted to reach the main sewer or septic system. It is commonly used in:

• Basements with bathrooms or laundry rooms – Ensure efficient drainage in lower levels.
• Homes with plumbing below street level – Prevent sewage backups when gravity flow isn’t possible.
• Commercial buildings with underground facilities – Allow restrooms and kitchens to function properly.
• Septic systems with lower-level fixtures – Pump waste into the septic tank when gravity isn’t sufficient.

2. How Does a Sewage Ejector Pump Work?

A sewage pump system operates automatically to remove wastewater from lower-level plumbing fixtures and push it into the main sewer or septic system. Here’s a step-by-step breakdown of how it works:

• Waste enters the sewage basin (also called an ejector pit) from basement fixtures.
• The float switch rises, detecting increased wastewater levels.
• The pump activates, pushing waste through the discharge pipe toward the sewer or septic line.
• The check valve prevents backflow, keeping waste from re-entering the pit.
• The pump shuts off automatically once the wastewater is removed.

This cycle repeats automatically, keeping lower-level plumbing systems functioning efficiently.

3. What Are the Essential Parts of an Ejector Pump System?

This system is made up of several key components that work together to move wastewater from lower-level plumbing fixtures to the main sewer or septic system. The pump motor powers the unit, while a float switch detects water levels and automatically activates the pump. Wastewater is collected in a sewage basin, then pushed through a discharge pipe with a check valve to prevent backflow. A vent pipe allows air to escape, preventing pressure buildup and odors. Some systems also have an alarm to warn of potential failures. Together, these components ensure efficient wastewater removal and prevent plumbing issues.

4. Difference between Old Float and the Triple Air Pressure Switch System

Another essential point to know is the difference between the Old Float and the Triple Air Pressure Switch System. The Old Float System uses floating switches that rise and fall with the liquid level to activate the pump. However, it is prone to mechanical failures due to debris, tangling, and/or excessive wear. Additionally, the float can get stuck, leading to pump failure and requiring frequent maintenance.

In contrast, the Triple Air Pressure Switch System uses air pressure sensors instead of mechanical floats to detect liquid levels. Its triple redundancy ensures the system remains operational even if one of the sensors fails. Furthermore, since there are no moving parts submerged in wastewater, the risk of wear and clogging is significantly reduced, making it more reliable and requiring less maintenance compared to float systems.

5. Types of Sewage Ejector Pumps

Sewage ejector pumps vary by function and usage. Automatic pumps operate with a float switch, while manual pumps need external control. Single pumps suit homes, whereas duplex systems provide backup for high-demand use. Residential pumps handle household waste, while commercial pumps manage larger volumes. Grinder pumps break down solids for longer or uphill pumping, while standard ejector pumps move soft waste. Choosing the right type depends on waste volume, plumbing setup, and needs.

It's important to note that a basic sewage ejector pump does not include a grinder and typically costs between $500 and $1,000. For a more advanced solution, a sewage ejector with a built-in grinder pump is available. This type features sharp, rotating blades that efficiently break down solid waste into smaller particles, preventing clogs, and ensuring smooth wastewater flow. It can handle most flushed objects, including tampons, cotton swabs, small toys like Legos, and more. These grinder-equipped systems generally range in price from $1,000 to $3,000.

SFA Saniflo offers two types of sewage ejector pump systems: Sanipit 24GR CB and Sanipit 24GR. Both are designed to handle wastewater from bathrooms, laundry rooms, and other plumbing fixtures located below the main sewer line.

• Sanipit 24GR CB – A powerful 1 HP ejector pump system featuring a heavy-duty grinder pump that grinds solid waste into a fine slurry for efficient pumping over long distances or against gravity. This complete kit comes with the basin and a ready-to-install solution. It also includes a control panel and an alarm system for enhanced operation and monitoring, along with a fail-proof air pressure switch system with triple redundancy for added reliability.
• Sanipit 24GR – Designed to fit into any existing pit, it serves as an easy replacement for older systems and contains the same features as the Sanipit 24GR CB, except for the basin. Both systems are efficient, durable, and built to handle demanding plumbing setups, ensuring smooth wastewater removal in residential and commercial applications.

The SFA Saniflo sewage ejector grinder pumps offer white-glove maintenance, allowing you to easily access the major internal components without getting dirty. In addition, we provide the best warranty on the market— a 2-year warranty, plus an additional 2 years when you register your product on our website.

A sewage ejector pump system is a crucial investment for homes and businesses with below-ground plumbing. It prevents costly plumbing issues, ensures smooth wastewater removal, and allows for the installation of basement bathrooms, sinks, and laundry rooms with confidence. Choosing the right system will provide long-term reliability and efficiency for your drainage needs.

Need a reliable sewage ejector pump for your home or business?