The RV black water tank needs more
attention primarily to control odor but also to keep solid waste and toilet paper from
collecting and plugging the rv drain line and valve. The black water drain valve should be
left closed until the rv tank is 2/3rds or more full. This helps avoid the solids building up
right under the rv toilet and assists flushing everything out. If the tank is not 2/3rds full
when it is time to break camp, simply add water through rv toilet. It's a good idea to close
the gray water valve the night before breaking camp. Then when it's time to unhook, drain
the black water rv tank first then the gray-water rv tank thus flushing the black-water
completely through and 'rinsing' the sewer hose. The procedure works but I don't always
remember to close the valve the night before. I use a rv rinse wand which attaches to my
utility hose and goes down through the rv toilet into the black water tank. It really works
fast at flushing and rinsing the rv tank. With all the freshwater going into the tank
eventually the sewer hose is flushed clean also. I don't rinse the black water tank every
time I dump but an occasional rinse does help control odor especially during the hot
summer months. Please don't take the time to flush your rv holding tanks when there are
people behind you waiting for their turn at the dump station. Flush your rv tank when you are
at a campsite with hookups or if you're sure no one will be needing the dump station.
After the black water tank is drained and flushed close the valve and add enough water to
cover the bottom of the tank and then add the tank chemical.It's my opinion that RV
holding tanks are just that, holding tanks. They are not mini septic systems. I can't
imagine any serious bacterial or enzyme action happening in the two to four days that most
RVers 'hold' their rv black waste. If that were the case we wouldn't need 3"
rv sewer hoses
or macerator pumps. Again, it's just my opinion, but the only reason for using
rv chemicals in
the black tank is for odor control. If you're using rv chemicals for any other reason you're
just kidding yourself. I know it is a controversial stand but someone had to say the
emperor has no cloths.
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