Is the Yitao toilet 7273 model pumping good?

According to what you said, it is most likely not "poor pumping", but "poor drainage" and "poor drainage". Because: "the water in the tank can be drained at one time" means that the pumping is normal, and if the pumping is not clean, it cannot be discharged, the drainage is slow, and there are many dirty things, which cannot be washed away.

The crux of poor drainage may be: 1) The selected toilet drain inner cavity pipe is designed to be thinner and the discharge is harder.