Nowadays, in many villas with basements or houses with basements on the first floor, the space in the basement is fully utilized by designing a bathroom, kitchen, wet bar, laundry room, etc. If there is a light well, it is not uncommon to design a sunken small courtyard in the basement. The space in such basements is different from that of the upstairs area in terms of drainage, which requires the use of a sewage lift pump to solve the problem. The main purpose is to lift and transport the sewag