Can I Use a Garbage Disposal with a Septic System?

Author: Staff Writers


You can use a garbage disposal with a septic system, but the cost of maintaining the system will be higher. 

More Info: A garbage disposal can be used with a septic system, provided it is designed to accommodate the additional waste that is generated. However, frequent use of a garbage disposal can lead to an increased amount of solids and grease in the septic tank that will require it to be pumped out on a more frequent basis.

How Garbage Disposers Work 

Garbage disposals shred food waste so that it can fit through plumbing pipes instead of being thrown away in the household waste that ultimately goes to a landfill. It is also a plus to have food scraps disposed of immediately versus having them start to decompose and cause odors in the garbage bin. To maintain a properly functioning garbage disposal, it is important to remember that only food items or water should be put down the disposal, and it is beneficial to run water while using the disposal and for a brief moment thereafter to assist the flow of the food scraps through the plumbing pipes.

How a Septic Tank Works 

A septic tank works by microbes in the tank breaking down the solids into liquids that then percolate into the soil surrounding the septic system, after passing through the drain-field. Oils and grease generally do not readily decompose and contribute to sludge build-up in the septic tank. And using a garbage disposal makes it easier to dispose of many food scraps, resulting in additional strain on the septic system. To maintain a properly functioning septic system it is generally recommended that the septic tank should be pumped out annually if a garbage disposal is used, as compared to at least every three to five years without the use of a garbage disposal.

Choose a Septic Friendly Garbage Disposal

Many of today's garbage disposals are designed to be septic tank friendly by ejecting enzymes every time the unit is used.  For example, InSinkerator has a septic disposal unit that use a Bio-Charge enzyme solution that can be purchased as a replaceable cartridge.  The solution is designed to reduce pipe buildup, break down waste, and help control odors.    


Works Cited

Environmental Protection Agency
A Homeowner's Guide to Septic Systems

City of San Diego Official Website
Grease Disposal Program | Wastewater
Septic Systems: How They Work and How to Keep Them Working

purplearrowExpert Opinion

Quote: ""A garbage disposal grinds up kitchen scraps, suspends them in water, and sends the mixture to the septic tank. Once in the tank, some of the materials are broken down by bacterial action, but most of the grindings have to be pumped out of the tank. Using a garbage disposal frequently can significantly increase the accumulation of sludge and scum in your septic tank, resulting in the need for more frequent pumping.""

SourceA Homeowner's Guide to Septic Systems  US Environmental Protection Agency.



Quote: "Remember: Regular pumping helps prevent solids from escaping into the drainfield and clogging soil pores. While pumping frequency is a function of use, MassDEP recommends that systems be pumped at least once every three years for homes not having a garbage disposal. If the home's system has a garbage disposal, it should be pumped every year."

SourceHow Often Should I Pump Out My Septic Tank?  Mass Gov. Executive Office of Energy and Environmental Affairs.

purple arrowCite this Article

"Can I Use a Garbage Disposal with a Septic System?." Sophisticated Edge. N.p., n.d. Web. . <>.  

The information on this Web site is designed for educational purposes only. It is not intended to be a substitute for informed medical advice or care. You should not use this information to treat or diagnose any health problems or illnesses without consulting a physician. It is not meant to take the place of health care or services you may need. Please consult a physician with any questions you may have regarding your health.

New! Be the First to Follow Us

Sophisticated Media LLC | Copyright © 2009-2014
Privacy Policy | Terms of Service | Contact Us
Sophisticated Allure | Sophisticated Blog | Sophisticated Gardening | Sophisticated Manners
Visit Us On: Facebook lTwitter