The last thing you want to do while taking a road trip is to have to pull over in order to dump and clean the holding tank. Do not overthink this process and let it get in the way of you enjoying your time on the road. Though it is not a fun job, it is not a very difficult one either. As long as it is done properly and routinely, you should have no issues with your RV holding tank during your travels.
Here are some tips to help you efficiently flush your RV holding tank:
Gather all of the supplies you will need before flushing your tank at an approved RV waste site or connect up to one at the campsite. Supplies needed include a hose dedicated to dumping gray and black water tanks, flush hose, hand sanitizer, disinfectant wipes, and a good pair of heavy disposable rubber gloves. Some seasoned RVer’s use an inhale filter, however done properly, you won’t have to much odor when dumping.
Your first step is to check the dump valves (the large one is for black water and the smaller one is for gray water) to make sure they have both been closed. An open valve means there will be waste water at the cap and you’ll have quite a mess when opening it. With your gloves on, remove the sewer cap and attach the clear adapter to the drain valve. This product allows you to see when clean water is flushing through the tanks. Add the dump hose to the adapter and ensure there is a tight seal before continuing.
Carefully carry the hose to the sewer connection or the dump site’s drain system and attach the hose. Most dump hoses have special engineered fittings to make a secure connection. If not, you will need some type of weight on the hose to keep it down in the dump station hole.
Pull the valve on the black water valve to empty the black water tank first. If you have a black water tank flush, attach a garden hose and run water at the same time to help flush out the solids. If you do not have a black water tank flush valve, run water through the toilet by depressing the lever at the toilet. This will take 2 people as one will need to watch the flow. You can also run a hose through the bathroom window and connect a toilet wand.
Once the flow seems to be clear, it’s a good idea to close the valve and fill the tank up with water to about ½ full. Open the valve again and you will be amazed at how dirty the water is after it seemed to be clean! If you have more than one black water tank to dump, always dump the back or furthest away from the valve.
After the second flush of the black water tank, close the valve and open the gray water tank valve. This is much cleaner shower and sink water and will make it easier to clean the dump hose when you are done. Once done, disconnect the hose from the sewer dump and the RV. Carefully coil up and place in its storage area. Securely close the drain cap and make sure all valves are closed.
Run additional clean water in both tanks and add an approved tank solution to the mix. This will help clean the probes, lubricate the valve, keep odors down, and disinfect. Only dump the tanks when they get more than ½ full to help get rid of solids in the tank.