The Effects of Borax and Washing Soda on a Septic System

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Borax and washing soda can be safely introduced to your septic system. Using them has no negative effect and can help deodorise and maintain the system. Borax and washing soda are often used for other household tasks.

Washing Soda

Washing soda is also known as sodium carbonate and is generally used for laundry purposes and as a water softener. Washing soda combined with hot water can be used to unclog drains and toilets by breaking down grease and material in drains to flush them through.


Borax is also known as sodium borate or tetraborate. Borax is a naturally created substance, but it can be artificially created using other substances. Borax is used in many household chemicals and can also be purchased as unaltered powder. Generally, borax is safe to use in your septic system, and regular use of borax can deodorise and clean toilets, sinks and drains.

Other Uses

Borax can be used as a pesticide throughout your home in its powdered form or by converting it into a paste or spray. Borax also may be added to your laundry cycle to enhance cleaning. Washing soda can help remove stains and hard water rings from toilets and around drainage areas.

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