The reality is that many users of WC are not that careful and water runs down the outside and permeates the medium under the pan.
If its anything other than ceramic or concrete then it will soften and cause the pan to wobble and that will make the problem with the substrate even worse.
Tony
If its anything other than ceramic or concrete then it will soften and cause the pan to wobble and that will make the problem with the substrate even worse.
Tony