Is it acceptable to ever dump an RV toilet into a home septic system tank?
I would not hesitate to occasionally dump a portajohn or small, portable, chemical toilet into a home septic tank – the volumes are so low, typically two gallons or so total, that the deodorants or disinfectants in that small container would be so dilute as not to harm the tank bacteria. But not only in view of the typical state standard on dumping chemical toilets into the environment, but further and more serious, an RV is a different matter as the holding tank is much bigger. It depends on what chemicals you’re using in your RV holding tank. I’d contact the manufacturer and ask for their literature on this point – if you get something from the manufacturer of your product, pass it on to me. Here’s one example of one manufacturer’s comment about dumping RV chemicals into a septic:: “Yes [you can empty your RV holding tank into your septic system], as long as your septic system is fully functioning, adequately sized and properly maintained. If you do, it’s important to use only the re
