Effluent Pumps 101

Rachel Kline • October 4, 2024

Everything You Need to Know About Effluent Pumps & How they Differ from Sewage Pumps

At John Kline Septic, we offer repairs and replacements for a variety of septic pumps including Grinder Pumps, Sewage Pumps and Effluent Pumps. Each type of pump has unique applications depending on the type of septic or sewer system your home or business is connected to. Effluent pumps play a key role in managing "greywater," which refers to wastewater with limited solids. This can include laundry water, some septic fluids, and other forms of wastewater that are typically lower in solid waste content. Effluent pumps are commonly used to move this greywater from a septic tank to a leach field or drain field, keeping your septic system functioning properly. Keep reading to learn more about the difference between Effluent Pumps and Sewage Pumps, or contact us today to schedule service! 

How Effluent Pumps Work:


  • Effluent pumps are designed to handle greywater, which is water that contains small amounts of waste, but not large solids.

  • These pumps are ideal for septic systems where gravity alone isn’t enough to move wastewater to the drain field. For example, if the drain field is located uphill or a distance away, an effluent pump helps transport the water efficiently.


  • The pump’s power is critical to its success. If your previous pump lasted for several years, you likely had the correct horsepower. However, if it failed after only a few months, it’s possible the horsepower was either too weak or too strong for the job. Choosing the right pump ensures that your system runs smoothly and avoids premature wear or failure.

Effluent Pumps vs. Sewage Pumps: What's the Difference?

The primary difference between an effluent pump and a sewage pump lies in what each is designed to move. Effluent pumps are built for greywater with minimal solids, ideally no larger than ½ inch in diameter. Sewage pumps, on the other hand, handle wastewater that contains human waste solids and can manage solids up to 2 inches in diameter. Sewage pumps also tend to be more powerful and pump water at a higher GPM (gallons per minute). For raw sewage or situations involving larger solids, a sewage pump or a grinder pump is recommended to prevent clogging and backups.


While a grinder pump works similarly to a sewage pump, it comes with the added feature of rotating blades that grind solid materials into a fine slurry before pumping it through the system. These pumps are often found in commercial settings like restaurants, bars, or rental properties where heavy-duty waste management is required.

When to Use an Effluent Pump

Effluent pumps are ideal for greywater applications, particularly when gravity alone can’t direct wastewater to the drainage system. Some common uses for effluent pumps include laundry drain pump systems, remote sink drain systems, and basement installations where water needs to be pumped up to the home’s main drainage lines. For example, if you’re adding a laundry room, wet bar, or sink in the basement, an effluent pump will efficiently move the wastewater to where it needs to go. Effluent pumps are also suitable for laundry tub drains, dishwasher drainage, and in some cases, sump pit applications—provided there’s no risk of large solids getting trapped in the system.

Why Call John Kline Septic for Your Sewage Pump Repairs or Replacements?

  • At John Kline Septic Services, we specialize in keeping your septic system running smoothly with expert effluent pump repairs and replacements. Whether you're dealing with a failing pump or looking to upgrade to a more efficient model, our team of experienced technicians will assess your system and recommend the best solution.

  • We also handle sewage pumps and grinder pumps, ensuring that you have the right pump for your specific needs. To learn more about septic pump repairs and replacement service, click here.


  • Locally-owned and family-operated, John Kline Septic Services offers prompt, reliable service at competitive prices. Whether it's an emergency repair or routine maintenance, you can count on us to keep your septic system functioning at its best.


If you need help with your effluent pump, give us a call today! We're here to make sure your wastewater system works efficiently for years to come.



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