Black Holding Tank slow to drain...
Our Black Holding Tank is slow to drain. Can this be caused by a bad Air Admittance Valve or a clogged vent cap or both? The tank dumps fine at first, but it eventually backs up and then very slowly...
Forum Discussion
1. put a water hose in the toilet and fill black tank about 3/4 full then open black tank valve, leaving the water hose running. Repeat process 2 or 3 times. If this does not resolve the issue call the local septic tank removal business and have your tank emptied.
