After emptying the black tank then empty your gray tank.
Cleaning rv black tank with borax.
Maintaining your rv s black water tanks also known as waste tanks or holding tanks is probably the least glamorous part of rv life but regularly cleaning your sewer system will help prevent unpleasant odors prevent clogs in the system and keep your tank sensors working correctly.
Then add a cup of bleach to the rv holding tank by dumping the bleach down the toilet.
The borax and baking soda.
Start by dumping the black tank and then fill it to 2 3 full of water.
While it doesn t hurt the tank it really doesn t add much value in order to keep rv tanks clean so we see no point in adding it unless we re out of the calgon water softener.
It s not safe have no fear.
Dissolve approximately a half cup of water softener into a quart a hot water and flush it down the toilet.
The third ingredient is citric acid.
This helps to further clean and deodorize the tank.
We can t be putting that in our tanks.
Citric acid in the rv holding tanks.
After dumping fill the tank with clean water by flushing or pouring clean water into the toilet.
Next dissolve approximately one cup of liquid detergent into a quart of hot water and flush.
As an added measure many rvers include cup borax to the black tank along with the detergent.
No driving around this time.
The borax detergent helps control odor and cleans the tank.
For the next step plug your black tank.
Once the tank is full wait 5 minutes and then drain it completely.
If you ve been using the geo method you ll already have two of the ingredients on hand needed to make rv black tank cleaning bombs.
Then fill the tank until it s full.
Simply use your tanks as you normally do and empty when the tanks are 2 3 to full.
Technically if you use borax you should also add it to a gallon of hot water first.
You can also use a hose to run water in from outside.
Using dawn blue dish soap in the future.
Cleaning your rv s black water tank is relatively simple once you learn how to do so.
The water softener makes the water softer and more slippery preventing waste from sticking to the walls of the waste tank.
Rather than buy nasty and expensive chemicals for the waste tanks try using a 1 2 cup of good old borax laundry detergent and 1 4 cup of water softener.