When I flush the upstairs toliets or use the dishwasher it will back up into the kitchen sink with brown nasty water, and it looks like theirs paper in the water too. We just had our septic done about three weeks ago, the problem just started last week, should we check the filter of the septic, we used a snake and cleaned the drain pipes in the kitchen too.

Tell me more about this septic tank filter. When you say.

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We just had our septic done about three weeks ago

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Do you mean you replaced it or simply had it pumped?

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we used a snake and cleaned the drain pipes in the kitchen too.

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If you've cleared the blockage does that mean you located and repaired the blockage. Please explain wit a little more detail. Cheers, Tom