12 inch rough in

The **12 inch rough in** refers to the standard measurement used in plumbing and construction that indicates the distance between the finished wall surface and the centerline of a plumbing fixture’s drain or water supply lines. This measurement is essential for ensuring that all fixtures, such as toilets and sinks, are correctly positioned and connected during installation. Understanding the 12 inch rough in helps contractors and DIY homeowners plan and execute precise layouts for bathrooms and kitchens, avoiding costly adjustments later on.