black water holding tank leak at 25 gals???
Have removed underbelly and tested several times _ had my son add water through the toilet while I watched under the rig and at about 25 gals water dripped down from the top of the tank and tank has a...
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A defective "wax ring" (actually a foam-rubber seal) would present a leak INSIDE the RV, not outside underneath.
Also, as the OP mentioned, the leak starts well before the capacity of the tank is reached. The wax ring is at the top of the tank.
Also, as the OP mentioned, the leak starts well before the capacity of the tank is reached. The wax ring is at the top of the tank.
