1.    To touch the surface of it. If the surface is smooth, both the surface and body are exquisite, then the toilet is in good quality. While a bad quality toilet is rough on its surface, dim in its color, tiny holes on it when lighted.

2.    To meet a highly-porcelain standard, the high-quality toilet is firing in high temperature. So it is heavy when you lift it. While a bad quality toilet is in low temperature environment and it was heated in short time, so it is usually not fully porcelain.

3.    The toilet burned in high temperature is with low water absorption. Thus, it seldom absorb in polluted water and get bad smell. On the contrary, a low quality toilet will stink because it takes in a great deal of polluted water. It is hard for us to clean it. Moreover, it even cracks and leaps water after a period of time. When choose a toilet, you can knot at its surface slightly. If it sounds hoarse, then it may be cracked inside or it is not fully burned.

4.    When selecting a toilet, to touch the drain outlet to see whether it is smooth or not. If it feels rough, it means there is no glaze layer inside, which makes it easy to leap water. The gasket of the toilet shall be made of rubber or plastic, which makes it good in flexibility and tightness.

5.    The design of drain pipe is closely related to the function of flushing. Generally speaking, you should test flushing before you buy a toilet. Usually, when flushed 3 times using a standard 6 liter water tank, a standardized toilet can pump out 5 standard ping-pong balls.