Oil will also age. It will slowly oxidize over time, so it will turn black and deteriorate.
The important step before stopping the pump is to open the inflation valve on the pump to destroy the vacuum so that vacuum oil will not be sucked into the pump chamber. This will prevent back suction and will also help to start the pump smoothly next time.
Just pay attention: observe through the sewage window when the liquid level is still about 30 centimeters from the top of the tank, turn off the suction truck. This can effectively avoid the overflow of sewage and cause the suction truck to break down. Damage to components allows your septic suction truck to operate safely and normally, reducing maintenance costs, saving maintenance time, and bringing you more profits. You can also install an anti-overflow valve. The anti-overflow valve will sound an alarm before the septic suction truck fills the tank. At this time, the user of the septic suction truck only needs to turn off the septic suction truck. This is usually done by the septic suction truck for sale. The staff will tell you whether you need it. If so, you will need to pay extra.