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Unclogging a Drain or Toilet Attached to a Septic System

Category Plumbing
Unclogging a toilet on a septic system usually involves taking care to not use chemicals that can harm the septic system. That said it can still usually be done by the homeowner. This is a guide about unclogging a drain or toilet attached to a septic system.


Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

By 2 found this helpful
January 8, 2010

Has anyone with a septic tank used the soap and hot water method to unclog toilets? Would this damage your septic tank?

By Billy from Rocky Mount, NC



January 8, 20101 found this helpful
Best Answer

It works and will not harm it. In fact, most commercial products don't harm them either. Just read the label on the container.

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By 0 found this helpful
July 28, 2016

Our kitchen drain is slow. What can be used if you have a septic tank?


February 27, 20170 found this helpful

Something that works great for me is to

- boil a teakettle full of water
- get a cup of baking soda
- a cup of vinegar

go to the drain, empty the whole baking soda, then the vinegar on top of it. After the fizzy reaction, pour the entire thing of boiling water on the mess.


This really helps in toilets too.

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February 28, 20170 found this helpful

You can buy a zip-it, a mini snake, at Home Depot. I've pulled out a lot of crud from sinks this way.

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By 0 found this helpful
December 6, 2010

Does anyone have any tips for unblocking a drain? It needs to be pretty natural as we have a septic tank (we don't want to kill the bacteria).

By Jacqui428


December 6, 20100 found this helpful

You can pour a box of baking soda down the drain and follow it up with a big pot of boiling water. If that doesn't work you can try snaking the drain.

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December 7, 20100 found this helpful

I also have a septic tank and drain field. I have used sodium hydroxide (lye) several times without problem a could help, but who knows.

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