Concealed Shower System Specification: Rough-In, Depth, and Outlet Planning
A concealed shower system looks effortless—until the rough-in is wrong. This guide covers wall depth, outlet planning, diverters, and coordination notes for clean installations.
Concealed shower systems are specified for their minimal, architectural look. The success of the installation depends on correct rough-in, correct depth, and a clear outlet plan.
Before you start: define the outlet plan
- Overhead (rain) shower
- Hand shower
- Body jets (optional)
- Tub spout (optional)
Confirm whether you want simultaneous operation (two outlets at once) or diverted operation (one at a time).
Rough-in coordination checklist
- Wall build-up: substrate + waterproofing + tile thickness
- Minimum cavity depth: valve body + tolerances
- Trim alignment: final faceplate should sit flush and level
- Pipe routing: avoid tight bends that reduce flow
- Access: ensure future service access to cartridges/diverters
Common mistakes
- Valve body set too deep or too shallow (trim won’t fit correctly)
- Diverter outlet mapping not documented (confusing controls)
- Flow constraints ignored (weak performance on rain head)
If you’re delivering multiple bathrooms (apartments or hotels), treat the rough-in as a repeatable system: one standard detail, one set of tolerances, and one commissioning checklist.
Related guides: Thermostatic Shower Valve Guide and Hotel Bathroom Specification Checklist.
Browse products: Shower Systems.