oldmattb wrote:
Is the RV hooked to a septic system? Unless they plan to travel with it, they could bypass the tank entirely.
Matt B
Is that possible? If you bypass completely solids will get plugged up in hose to sewer.Unless im missing something you cant bypass the tank,you need the water of the tank to stop solids from turning to cement.
My guess from your description it was a vent that was blocked and gases caused the "explosion" sound.If it froze I believe it wouldnt have sounded so much like an explosion.
Personally I wouldnt want to repair a black tank if it split down the entire top.I would replace.