Inspections

Plumbing Permit Inspections in Los Angeles

What LADBS plumbing inspections are required? Rough-in, final, and scheduling in Los Angeles.

Los Angeles Plumbing Permit Inspections Overview

Plumbing installations in Los Angeles performed under a permit must be inspected by LADBS at key project stages to verify compliance with the California Plumbing Code and the approved permit. Scheduling inspections at the correct stages prevents rework and keeps your project moving forward.

Underground and Below-Slab Inspection

For projects involving underground plumbing — including slab-mounted drain lines, sewer laterals, or underground water supply — an inspection is required before the trench is backfilled or the slab is poured. The inspector verifies pipe type, slope, bedding, and connection points.

Rough-In Plumbing Inspection

A rough-in inspection is required after drain, waste, and vent (DWV) piping and water supply lines are installed but before they are concealed within walls, floors, or ceilings. The LADBS inspector reviews pipe sizing and material compliance, drainage slope (typically 1/4 inch per foot for horizontal runs), vent connections and sizing, gas line installation and pressure test results, cleanout accessibility, and water supply pipe routing and sizing.

Water Heater Inspection

Water heater replacements and new installations require a plumbing inspection to verify proper installation. In Los Angeles, the inspector specifically checks seismic strapping (two straps as required), temperature and pressure relief valve and discharge pipe installation, gas connections and shutoff valve, venting for gas-fired appliances, and TPRV pipe routing to an approved discharge location.

Final Plumbing Inspection

The final plumbing inspection is conducted after all plumbing work is complete and fixtures are installed. The inspector verifies that all fixtures operate correctly, no leaks are present, gas connections are properly tested, the installation matches the approved permit scope, and all required clearances and access are maintained.

Scheduling LADBS Plumbing Inspections

Schedule plumbing inspections through the LADBS online inspection request portal, the LADBS Go mobile app, or by calling AIRS. Inspections should be requested at least one business day in advance. Do not

cover plumbing piping with drywall, insulation, or concrete before the required inspection is completed and approved.

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