During pumping, maintain stable vacuum, avoid tank wall damage, break up heavy solids with agitation

https://wiki-planet.win/index.php/Do-it-yourself_Prep_as_well_as_Pro_Tips_for_Proper_Septic_System_Pumping_as_well_as_Post-Service_Care

During pumping, maintain steady vacuum, avoid tank wall damage, break up heavy solids with agitation, and never ever enter the tank; deadly gases need stringent confined-space safety protocols.