Plumbing Installation Inspection

Per IPC/UPC, water supply piping must be properly supported, sized, and tested. Copper pipes require proper soldering; PEX requires approved fittings. Supply pressure at fixtures should be 40-80 psi per IPC 604.

1. Visual inspection — look for leaks at all connections and joints

2. Check water pressure with a gauge at hose bib — should be 40-80 psi

3. Verify proper pipe support spacing (copper: 6' horizontal, 10' vertical; PEX: 32" horizontal)

4. Confirm hot water is on the left side at all fixtures

5. Check for approved materials (no polybutylene or lead solder)

- Leaks at joints and connections

- Water pressure too high (over 80 psi) — requires pressure reducing valve

- Inadequate pipe support causing sagging

- Mixed metals without dielectric unions (galvanic corrosion)

Per IPC Chapter 7, drain pipes must maintain proper slope (1/4" per foot for pipes 3" and smaller, 1/8" per foot for 4" and larger). All fixtures must be properly vented per IPC Chapter 9. Cleanouts required per IPC 708.

1. Check drain slope with a level — minimum 1/4" per foot for standard drain lines

2. Verify all fixtures drain properly without gurgling (indicates venting issues)

3. Look for cleanout access points at required locations

4. Check for proper P-traps at all fixtures (prevents sewer gas)

5. Verify vent pipes extend through roof without obstruction

- Insufficient slope causing slow drainage

- Missing or improper venting causing gurgling and slow drains

- S-traps instead of P-traps (code violation)

- Missing cleanouts at required locations

Per IPC Chapter 4, all plumbing fixtures must be installed per manufacturer specifications and connected with approved fittings. Toilets must be set on a stable, level flange. Faucets must have proper hot/cold orientation.

1. Check all faucets operate smoothly with proper hot/cold sides

2. Verify toilets are secure, level, and don't rock

3. Test all drains for proper flow rate and no leaks

4. Check caulking around tubs, showers, and sinks

5. Verify toilet flange is at proper height relative to finished floor

- Rocking toilets (improper flange height or installation)

- Leaks at supply connections to fixtures

- Reversed hot/cold water connections

- Inadequate caulking at fixture-to-wall transitions