Use sewage pump. The septic tank downstairs in our community is the sewage pump (submersible sewage pump), which is quite easy to use. Choose a pump with small lift and large flow, which has a large opening and is not easy to block. It's best to get an ultrasonic level gauge or something, which can automatically pump water and stop the machine. Convenient and labor-saving.

During normal operation, if the traffic jam is serious. Stainless steel mesh can be added to the pump, which can effectively prevent the pump from blocking. I hope I can help you.