Originally Posted by WNY Bullet
Yes we have three exterior handles for our three tanks. (two gray an one black)
We are on day 3 of our 5 day holiday weekend and Black is 2/3 full, Bath Gray is 1/3 (after several showers), and kitchen gray 1/3.
Are you measuring your tank levels using the "LED gauges" or some other method? The gauges are notoriously known for not being accurate. Most of us don't rely on them and just resort to listening to the sound of effluent in the tank, as the sound changes, we've learned to judge how full the black tank is based on the sounds when flushing.
As an example, when I dump my black tank, rinse it well and close the valve (on a known empty tank) sometimes the gauges will read empty, sometimes 2/3 full, sometimes 1/3 full, and sometimes 3/3 full. It all depends on what is hanging on the ends of the sensors inside the tank.
So, if you're relying on the gauges to tell you the tank status, you might be "following Dorothy down the rabbit hole"......