Do’s & Don’ts of Septic
If you're living with a septic system, what goes down your drain matters. Unlike city sewer systems, your septic tank relies on natural bacterial processes to break down waste and safely treat water. Putting the wrong things down your drain can disrupt that process, cause clogs, or even lead to costly system failure.
As septic professionals and in the business for over 55+ years, we’ve seen the good, the bad, and the downright messy. Here's a clear breakdown of what you can and should never send down the drain.
What’s Safe to Put Down the Drain
Human Waste and Toilet Paper (Septic-Safe Only)
Your system is built to handle these essentials.
Be sure to use toilet paper labeled “septic-safe.” It breaks down more easily and won’t clog your tank.
Water from Sinks, Showers, and Laundry (Used Wisely)
Everyday water is fine, but be mindful of how much you use.
Spread out laundry loads and avoid draining large volumes of water all at once to prevent overloading your system.
Mild, Septic-Safe Cleaners
Look for products labeled “safe for septic systems.”
Natural cleaners like vinegar and baking soda are excellent alternatives.
What Should Never Go Down the Drain
Grease, Fat, and Cooking Oil
These harden in pipes, form blockages, and create a thick scum layer in your tank.
Instead, pour grease into a container and dispose of it in the trash once solidified.
Flushable Wipes (Even if Labeled “Flushable”) - we have a full blog post dedicated to this. This is a sticking point for us!
These don’t break down like toilet paper and can cause serious clogs.
Always toss wipes in the trash.
Chemicals and Harsh Cleaners
Bleach, drain cleaners, paint, solvents, and antifreeze kill off the bacteria your septic system relies on.
Avoid anything labeled “antibacterial” or “disinfectant” unless it’s septic-safe and used sparingly.
Food Scraps and Coffee Grounds
Even with a garbage disposal, food can clog pipes and overload your tank with solids.
Scrape plates into the trash or compost bin.
Medications
Flushing old prescriptions contaminates your tank and local groundwater.
Use a pharmacy take-back program instead.
Feminine Hygiene Products, Diapers, and Paper Towels
These expand, don’t break down, and cause costly backups and pump issues.
Pro Tip from the Field: If it didn’t go through you or come out of a faucet, it probably doesn’t belong in your septic system.
Keeping your septic system healthy is all about prevention. By watching what goes down the drain, you’ll reduce the risk of backups, extend the life of your system, and avoid expensive repairs or early replacements.
Need Help or Have Questions?
We’re here to help with septic inspections, septic pump-outs, or even a quick septic consult. Contact us anytime to schedule a service or get expert advice on keeping your septic system running smoothly.