Shower Installation
Every shower is built twice: once behind the wall (valve, risers, outlets, drain) and once in front of it, in tile and glass. The first build decides everything about how the second one performs, and its most unforgiving detail is depth: a valve roughed in too deep or too shallow for the finished wall leaves trim that never sits right, for the life of the bathroom. Good shower installation is mostly the discipline of getting the invisible build measured, tested and signed off before anything covers it.
This page covers the plumbing scope of new and replacement showers: valve and outlet work, drain changes where layouts move, and the coordination with waterproofing and tile trades whose work this plumbing must precede. Repairs to existing showers live on their own pages; full bathroom transformations belong to the remodeling project pages.
How a Plumber Diagnoses the Problem
The behind-the-wall decisions:
- Valve choice and depth. The mixing valve is chosen for the outlet plan (shower only, tub-shower, multi-outlet) and set to the manufacturer's depth off the finished wall, measured from tile-to-be, not from studs, which is exactly where the classic mistake lives.
- Outlet architecture. Head height set for the household, handheld and body sprays planned with their diverters now. Every outlet is trivially cheap at rough-in and disproportionately dear after tile.
- The drain question. Same-footprint swaps reuse the drain; layout changes, curbless designs and tub-to-shower conversions move it, floor-opening work scoped honestly as part of the plan rather than discovered.
- Supply health check. The risers feeding the new valve get inspected while access exists. Connecting a new valve to failing galvanized is a false economy the open wall exposes for free.
- Test before tile. The completed rough holds pressure on the supply side and water-tests the drain connection before waterproofing and tile proceed, the gate that keeps every later trade off this plumbing's conscience.
Service Details & What's Included
The scope boundaries, stated plainly:
- Plumbing versus finish. Valve, piping, outlets and drain are this scope; waterproofing membranes, tile and glass belong to finish trades. On coordinated projects the handoff is scheduled; on plumbing-only engagements it is documented.
- Replacement's quiet advantage. A shower being re-tiled anyway is the cheapest possible moment to modernize the valve and add the outlets you always wanted. The wall is open on someone else's budget line.
- Code items ride along. Modern anti-scald valves are the standard the work meets by default, an upgrade many older showers get as a side effect of any valve project.
- What drives the number. Valve and outlet count, drain relocation or not, riser condition, and access. The tile side's cost lives with the tile trade, and the quote says which side each dollar sits on.
Frequently Asked Questions
What plumbing is included in a shower installation?
The system behind the wall: mixing valve set at correct depth, risers and outlet drops, the drain connection (moved or reused), and the pressure and drain tests before closure. Trim installs after tile as the visible finale. Waterproofing and tile are partner trades: essential, and separate.
Can the existing valve stay if it works?
In a cosmetic re-tile, sometimes, but an open wall is the once-a-decade chance to retire an aging valve for the cost of the part. Keeping an old valve behind new tile means betting expensive finish work on its remaining years; the honest math usually replaces it while replacement is cheap.
What happens if the drain or valve location needs to move?
The floor or wall opens to reroute: routine in remodels where surfaces are being redone anyway, and priced as real work when they are not. Layout changes are exactly when a shower project graduates from fixture swap toward the remodeling pages, and the plan says so before demolition does.
Is tile and waterproofing part of the plumbing scope?
No, and the boundary protects you: waterproofing is its own specialized discipline that warranties its own work. The plumbing gets tested and approved first, then membranes and tile build on it. What this scope promises is that nothing behind their work will be the reason it reopens.
How is the rough-in tested before the walls close?
Supply side under pressure with joints inspected, drain connection water-tested, held and verified before waterproofing proceeds. It is the same gate logic as any rough-in inspection: every problem found at this stage costs a fitting; the same problem found later costs a tiled wall.
Plan the Shower Build
Describe the project (new, replacement or conversion), the outlets you want, and whether the layout moves. The behind-the-wall plan comes first, the test gate is non-negotiable, and the tile arrives to a system already proven.
Request a Quote for Shower Installationor call (800) 555-0147Only license-checked plumbers who cover your ZIP receive your request.