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Q: anti-freeze in septic systems ( Answered,   0 Comments )
Subject: anti-freeze in septic systems
Category: Miscellaneous
Asked by: plumis-ga
List Price: $10.00
Posted: 25 Dec 2002 12:00 PST
Expires: 24 Jan 2003 12:00 PST
Question ID: 133310
I will probably need to drain my pipes due to loss of electricity and
heat in order to keep them from freezing and bursting.  I would like
to put anti-freeze in the drains and toilet, but question if it is
safe for the septic system (holding tank).Does anyone have an answer?
Subject: Re: anti-freeze in septic systems
Answered By: bobbie7-ga on 25 Dec 2002 12:35 PST
Hello Plumis,

According to “Your Septic System - A Reference Guide for Homeowners”,
antifreeze is not safe as you can poison your septic system and the
groundwater as it can kill the beneficial bacteria that treat your

Tips to Avoid Trouble:

“DON'T use commercial septic tank additives. These products usually do
not help and some may hurt your system in the long run.

DON'T use your toilet as a trash can by dumping nondegradables down
your toilet or drains.

Don't poison your septic system and the groundwater by pouring harmful
chemicals down the drain. They can kill the beneficial bacteria that
treat your wastewater.

Keep the following materials out of your septic system: 

NONDEGRADABLES:grease, disposable diapers, plastics, etc. 

POISONS: gasoline, oil, paint, paint thinner, pesticides, antifreeze,

Source: Massachusetts Government Website

Septic systems require periodic check-ups and proper care to remain
healthy and function properly. They must have a healthy diet to
prevent groundwater and soil contamination as well as costly repair

“Keep all toxic and hazardous chemicals out of your septic systems.
Even small amounts of these chemicals can destroy the biological
digestion taking place within your system.”

Source: Massachusetts Government Website

Antifreeze – Hazards
“Can disturb the biological action of sewage treatment and septic

B.F. Environmental Consultants also advises against antifreeze in the
septic system.

“Since the septic system relies on bacteria to assist in the
decomposition and transformation of the pollutants in the wastewater,
it is critical that hazardous chemical, non-organic material, or very
complex organic materials not be introduced to the system.”

Antifreeze is one of the items that should not be flushed down the
toilet or otherwise added to the septic tank:

Source: B.F. Environmental Website

Additional information that may interest you:

Septic Systems Explained

Antibacterial Products in Septic Systems

Use and Operation of Conventional Septic Systems

Search Criteria: antifreeze in septic systems

I hope you find this helpful.

Best Regards,
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