A WC unit is not an essential accompaniment to a back to wall toilet, however it is a highly recommended addition. And many back to wall toilets come supplied in cohesion with units as standard, which can help to create a nicer aesthetic overall.
The only instance in which a unit is not necessary is if a back to wall toilet is being fitted directly onto the wall. In such cases, invasive plumbing work would be required to successfully install the back to wall toilet in the first place, and key parts would be more difficult to reach should any repair work be required in future.
Take a look at our blog, Why To Upgrade To A Back To Wall Toilet, for a better insight into all aspects of this favourable modern home toilet option.
