"TomC" wrote in message
.. .
"EXT" wrote in
anews.com:


"Blattus Slafaly" wrote in message
...
Chris wrote:
Steve Barker DLT wrote:
when they do mine, it's empty when they leave.

s

"pat" wrote in message
...
How much liquid should be left on the bottom of a septic tank
after being cleaned 1", 2" or more?




Odd, the fill mine with water after pumping the sludge out. The tank
could be damaged if left completely empty, I am told.

You were told a lie.

A light weight plastic or metal tank in a high water table area might
want to float if it is not weighed down with plenty of soil overburden
or full of water.



In 2004, when building my new house, the 1500 gal.two chamber concrete
septic tank and line was installed but not backfilled. A tropical storm
came through and dumped about 2" of rain. The empty tank floated and
turned over in the trench. The installers broke it while trying to right
it and had to install another. So, it doesn't matter what their made of
it all has to do with water displacement in a confined space.

It has been a while since I last read of a concrete boat.