Throughout pumping, maintain consistent vacuum, prevent tank wall damage, break up heavy solids with agitation

https://wiki-triod.win/index.php/The_House_owner%27s_Guide_to_Spending_plan_Sewage-disposal_Tank_Emptying_and_Maintenance

During pumping, maintain constant vacuum, avoid tank wall damage, break up heavy solids with agitation, and never ever enter the tank; fatal gases require rigorous confined-space safety protocols.