guys,

im about to install an offset toilet flange to make my toilet more
center to the bathroom, got some Q he

1. how to remove the old pvc flange? if its PVC cemented is there a
way to loosen it? so that ill replace it w/ my offset flange?

2. any bad experience w/ offset flange? as i see in home depot there
is a curve/elbow on it, will it affect flushing?

3. pvc 101 please, how do i join two pvc? purple primer first then
cement?

thanx