[BillA]

Mike,

On our trailer there is a warning near the black tank flush connection stating that the dump valve must be open when flushing the tank. I assume that is because of the possiblity of building up internal pressure as the tank is being filled through the flush line which could result in rupture of the tank or blowback through the commode during the next activation of the flush valve. Does yours have the same warning? If so I assume that it has not been an issue for you due to the small amount of water being added to the tank?