WQP series stainless steel submersible sewage pumps are designed with large channel anti-clogging hydraulic components to greatly improve the sewage passing capacity, which can effectively pass through 5 times of the diameter of the fiber material and about 50% of the diameter of the solid particles. The mechanical seal adopts double-channel series seal, made of hard wear-resistant tungsten carbide, which is durable and wear-resistant, and can make the pump run safely for more than 8000 hours.