Odors may not seem likely until your tank is heated by the weather, then those odors creep into the RV and can make life uncomfortable. Gray water and black water tanks will retain odors even after you clear them to store your RV. Some cleaning products can to get rid of odors in black water tanks. All chemicals work best when the black water tank is at least half full. When flushing, add a little more water to help the chemicals work.
Blockage occurs when your black water tank does not have enough water or the proper chemical treatments to dissolve the solids. The toilet paper you use in your home will also cause a blockage because it does not dissolve properly. Buy toilet paper that is made to dissolve instantly. Do not purchase black water tank chemicals that contain formaldehyde because many RV parks forbid their use. Formaldehyde destroys the good bacteria and creates problems for the septic system in the parks.
Even with a well-maintained black water tank, you will eventually find leaks at the valves, toilet seat seal and drain leading from the black water tank. Older RV systems can wear out or dry out from sitting for long periods of time without use. Winterizing and preparing your RV for short-term storage will help maintain the systems. Longer-term storage requires occasional maintenance to keep the systems from drying out and becoming damaged. Flushing the tanks with chemicals containing lubricators for the valves and seals will help prolong the life of your system.
