How to measure toilet rough in. Toilet rough in measuring from wall to bolt cap. Windows Loader V2 1 Zip System. When talking toilets, the toilet rough in is the distance from the wall behind the toilet to the center of the outlet pipe where the waste leaves the toilet. The most common distance is 1. In some cases, the outlet is closer to or further away from the wall, especially in older homes. IscZIYXA/hqdefault.jpg' alt='Install Toilet Distance From Wall' title='Install Toilet Distance From Wall' />For those cases, toilets are available with a 1. Before replacing a toilet, measure the rough in or make sure your plumber measures before buying. To measure accurately, measure from the wallNOT the moldingto the bolt caps, as in this picture. Note The Professor sincerely apologizes for the ugly wallpaper. Tags toilet, toilet flush, toilet rough in. Posted in Toilet Replacement 1. Install Toilet Distance From Wall' title='Install Toilet Distance From Wall' />To speed up clothes drying and prevent lint buildup, install a smooth metal dryer vent. These stepbystep directions walk you through the tough parts. Rigid metal. When talking toilets, the toilet rough in is the distance from the wall behind the toilet to the center of the outlet pipe where the waste leaves the toilet.