Rough-In and Finish a Small Bathroom Plumbing System

A. Finished-Project Specification

Quantity: one rough-in and finish installation serving one lavatory and one toilet, built to the approved bathroom plan and fixture schedule, tested at rough-in and finish stage, inspected at rough-in and finish stage, and documented with a complete closeout package.

B. Capstone Readiness and Milestone Schedule

Milestone	Target Condition	Verification Method
Plan confirmation	Approved bathroom plan, fixture schedule, and permit conditions confirmed before rough-in begins	Written record on capstone worksheet
DWV rough-in	Toilet drain, lavatory drain, trap arm, and vent installed per the approved fitting pattern, slope, and vent relationship	Visual inspection and dry-fit record per Chapter 8 procedure
Supply rough-in	Hot and cold branches installed using the approved method and supported per plan	Visual inspection per Chapters 4–7 procedure
Rough-in test	Supply pressure test and DWV test both pass at the specified pressure and duration	Gauge reading and observed leak check
Rough-in inspection	Required inspection completed and approved before wall closure	Signed inspection approval
Finish installation	Closet flange, fixture stops, toilet, faucet, pop-up drain, and P-trap installed per Chapters 9–11	Visual inspection and operational test
Finish test	Static and operating leak tests pass on every disturbed connection	Direct observation during fill-and-release testing
Finish inspection and closeout	Required finish inspection passed; documentation complete	Signed inspection approval and completed closeout record

C. Material Takeoff

• Rough-in materials: pipe, fittings, supports, protection plates, and DWV components specified by the approved bathroom plan and fixture schedule — do not substitute an unspecified pipe size, fitting type, or support spacing.
• Fixture materials: the closet flange, toilet, lavatory faucet, pop-up drain, and P-trap components specified in the fixture schedule, installed per the Chapter 9, 10, and 11 material takeoffs.
• Test materials: caps, plugs, test manifold, and gauge required for the rough-in pressure test and DWV test.
• Documentation: one Rough-In and Finish Inspection Record set per project, plus photographs of concealed piping, test results, and both inspection approvals.

D. Acceptance Standards

Check	Standard
Plan compliance	Every pipe size, fitting type, slope, vent arrangement, and fixture clearance matches the approved plan and fixture schedule
Rough-in test	Supply pressure test and DWV test both pass at the specified pressure and duration with no observed leakage
Rough-in inspection	Required inspection completed and approved before any wall material is installed over the work
Finish installation	Toilet, faucet, pop-up drain, and P-trap installed and pass the acceptance standards defined in Chapters 9, 10, and 11
Finish test	No leakage observed at any disturbed connection under static and operating conditions during repeated testing
Finish inspection	Required finish inspection completed and approved before closeout
Documentation	Rough-In and Finish Inspection Record set complete with plan reference, test results, both inspection approvals, and punch-list correction record

E. Plan Confirmation and Project Preparation

1. Obtain the approved bathroom plan, fixture schedule, water-supply design, DWV and vent design, framing plan, finish dimensions, permit requirements, and inspection sequence. Confirm every document is current and applies to the assigned installation.
2. Confirm the project location, fixture clearances, accessibility requirements, structural conditions, and route availability. Verify the location matches the approved plan.
3. Define work assigned to the learner and work reserved for licensed or qualified professionals. Record the split on the capstone worksheet before proceeding.
4. Prepare the plumbing safety, shutoff, sanitation, material-control, testing, and documentation plan. Reference the Chapter 1 work-area readiness procedure for every shutdown required during this project.
5. Verify the building water-supply connection, approved test source, sanitary connection, vent route, and cleanout access. Confirm each connection point is accessible and matches the approved plan.

F. Layout and Framing Coordination

1. Mark lavatory centerline, toilet centerline, finished-floor reference, supply stub-outs, drain outlets, vent route, shutoffs, and access points. Use the approved plan dimensions; do not estimate a reference point.
2. Coordinate framing holes, backing, protection plates, and fixture supports without unauthorized structural cutting. Confirm every framing modification is authorized by the framing plan before cutting.

G. DWV Rough-In

1. Install the approved toilet drain, closet bend, flange riser or protected rough-in, and vented branch arrangement. Follow the Chapter 8 DWV assembly procedure for every joint.
2. Install the approved lavatory drain, trap adapter rough-in, trap arm, vent connection, and cleanout provisions. Maintain the exact fitting pattern specified in the plan.
3. Maintain the specified DWV fitting orientation, slope, support, and pipe protection. Verify slope using the method taught in Chapter 8.

H. Supply Rough-In

1. Install hot- and cold-water branches using the approved PEX, copper, or other specified system. Follow the exact joining procedure from the applicable chapter — do not blend methods.
2. Install fixture shutoffs or protected stub-outs in the planned locations. Confirm each shutoff is accessible after finish work.
3. Support supply piping, protect framing penetrations, and provide required movement or hammer control. Install protection plates at every penetration within the prohibited fastener zone.

I. Rough-In Testing and Inspection

1. Cap, plug, and label all rough-in openings. Confirm every cap and plug is secure before pressurizing the system.
2. Complete the approved water-supply pressure test. Apply the specified test pressure and duration and inspect every joint for leakage.
3. Complete the approved DWV test. Verify no leakage at any DWV joint under the required test method.
4. Correct failed joints or layout conditions using the controlled repair method. Depressurize before correcting any failed connection and retest after correction.
5. Obtain the required rough-in inspection before concealment. Do not install any wall material over the work until the inspection is approved.
6. Photograph and record all concealed piping, dimensions, supports, plates, and inspection approvals. Complete every field on the Rough-In Inspection Record before wall closure.

J. Finish Preparation

1. Protect plumbing during insulation, wall finish, flooring, and painting work. Confirm capped openings and protection plates remain undisturbed through finish work.
2. Verify final wall and floor thickness before trimming stub-outs and setting fixtures. Confirm the finished-floor and finished-wall dimensions match the approved plan before cutting any stub-out.
3. Install the closet flange at the approved finished-floor relationship. Confirm flange elevation against the finished-floor reference before securing it.
4. Install the toilet stop and lavatory hot and cold stops. Confirm each stop is accessible and operates through its full range.
5. Flush supply lines before fixture connection. Direct flushed water into approved containment.

K. Fixture Installation

1. Set and connect the toilet using the Chapter 11 sequence. Follow every step of the Chapter 11 work order without omission.
2. Install the lavatory faucet and pop-up drain using the Chapter 10 sequence. Follow every step of the Chapter 10 work order without omission.
3. Install and align the lavatory P-trap using the Chapter 9 sequence. Follow every step of the Chapter 9 work order without omission.

L. Finish Testing, Inspection, and Closeout

1. Restore water slowly and purge air. Confirm steady flow at both fixture stops before proceeding.
2. Inspect all supply connections under static and operating conditions. Check every connection disturbed during finish installation.
3. Fill and release the lavatory basin and operate repeated toilet flush cycles. Observe drainage performance under full-flow conditions.
4. Inspect drain connections, fixture seals, closet-flange area, surrounding floor, wall cavities where accessible, and the level below. Confirm no leakage at any point.
5. Verify fixture operation, shutoff access, drainage, vent performance, trap seals, and absence of cross-connections. Confirm every item against the approved plan.
6. Complete required finish inspection and correct all deficiencies. Do not close out the project with an open deficiency.
7. Label shutoffs and prepare the final system map. Use the Chapter 2 mapping method for the completed bathroom system.
8. Compile material records, photographs, pressure and DWV test records, inspection approvals, corrections, and maintenance information. Assemble the complete closeout package.
9. Complete the plumbing punch list and delayed leak reinspection. Confirm no leakage appears after the delayed observation period.
10. Hand off the functional bathroom plumbing system with documented operating and emergency-shutoff instructions. Provide the owner or responsible party with the completed closeout package.