Please see the following tips for drains in your unit.
A completely clogged drain will require the help of a professional plumber, but baking soda and vinegar might be a quick fix for a partially clogged drain. This solution will dissolve and push the sludge through the pipes to allow water to flow through easily.
1. Let hot water run for a minute to warm up the pipes.
2. Drop in 1/2 cup of baking soda down the drain.
3. Pour in 1 cup of vinegar, cover the drain with a plug and let sit for 10 minutes – you will hear fizzing.
4. Rinse with more hot water.
Please do not pour bleach directly down the drains as it will kill the good bacteria in the septic systems.