Forum Discussion
Medico
Sep 30, 2013Explorer II
One thing to consider, some people leave the black tank valve open, which allows the liquid to leave the tank, but NOT the solids. This causes the solids to dam up. It is ALWAYS recommended the black valve be left closed at all times unless actually dumping, and to allow the black tank to fill to at least 3/4 full before dumping. The fluids are necessary to get the solids flowing plus having more water gives more pressure on top of the solids to help push them out.
One method to help break down this dam is to add a few bags of ice (those large bags you buy at convenience stores) down through the toilet, then drive around with the RV allowing the ice to slosh around and break up the solid dam until the ice melts. This method actually works to break up these dams. The larger the black tank, the more bags of ice are needed.
It's difficult to know what the OP's problem might be, but this is one possibility. Flushing after dumping is really helpful. I usually fill the black tank 2 or 3 times with water to help flush out residual solids.
One method to help break down this dam is to add a few bags of ice (those large bags you buy at convenience stores) down through the toilet, then drive around with the RV allowing the ice to slosh around and break up the solid dam until the ice melts. This method actually works to break up these dams. The larger the black tank, the more bags of ice are needed.
It's difficult to know what the OP's problem might be, but this is one possibility. Flushing after dumping is really helpful. I usually fill the black tank 2 or 3 times with water to help flush out residual solids.
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