Once we reach the septic tank on your site that needs to be emptied, the vacuum truck is parked on a safe but easy to reach distance. We open the lid of the drain or septic tank and connect the suction-pipe to the tank of the truck on the one side and the other end goes into the drain/tank. We start up the motor that drives the pump that sucks the air out of the tank and then we open the valve to the pipe. The tank sucks the sewage/sludge that is in the drain/tank into the tank of the truck and when the drain is empty we close the valve, shut off the motor and load the suction-pipe and close the drain-lid. Then we are ready to leave your site and offload only at a registered municipal waste water treatment.