Should I use black water chemical in the gray water tank?
asked 5 May 2017 asked by MWB (450 points)
There is little or no value to the chemical use in the black water tank and gray water tank. Some of those chemicals contain strong stuff that will affect the systems you dump into andleading to treatment problem. If you use the RV regularly and don't "store" black & gray water in the waste tanks when not in use, there is simply no need for chemicals in the tanks. You can utilize a garden hose extension called an RV holding tank rinser if you want to clean your tanks without damaging the environment.
Thanks so much. I was concerned that the gray water tank might become sludgy after a while with sediment buildup.