I have been replacing the flooring in my upstairs bathrooms . I have replaced the sub-floor and installing new ceramic tile instead of the old linoleum flooring. There was some play in the toilet flange and I was able to pry the flange enough to get the tile installed. However after I have finished the flooring we now seem to have developed a clicking sound in what appears to be the drain pipe whenever the water is running in a near by sink or when the toilet is flushed. The drainpipe is PVC and I didn’t know if I could easily replace the flange.