stan.birch@m wrote:
>>On 28 Apr 2008 18:17:01 -0500, nothermark <nothermark@not.here> wrote:
>>the black tank started showing 1/4 full. Got up over a half so I stopped to dump it
>>on the way home.
>
>
> Black tank gauges never work correctly, even when they have been
> properly calibrated. The only reliable gauge is visual inspection by
> shining a flash light down the toilet hole.
And if you have a tank that slopes under the toidy, you won't see anything
until your tank is about half full. Our gray and black tanks each hold 53
gallons. Bathroom sink goes to the black tank. We can go two weeks with
reasonable showers.
We've never had any eruptions. The tank gauges lie like Bill & Hillary so
we don't trust 'em.
LZ