How to Fail Your Municipality's Residential Plumbing Final Inspection.

1. All Fixtures Set &; Sealed [IRC 22503.5.1]

All plumbing fixtures (sinks, toilets, tubs, etc.) must be securely set in place and properly sealed to prevent water leakage or damage to surrounding areas.

Common Reasons for Failure:

• Fixtures not securely installed or leveled.
• Improper or missing sealant around the fixture.
• Caulking that has gaps, is not waterproof, or is missing altogether.

2. No Leakage on Water or Drain Lines [IRC 2507.7]

Water and drain lines must not have any leakage to ensure proper operation and avoid water damage or mold growth.

Common Reasons for Failure:

• Loose connections at joints or fittings.
• Cracked or damaged pipes.
• Improper installation of drain traps leading to slow leaks or back-flow.
• Inadequate testing before inspection (e.g., pressure or water test).

3. Access Panel Where Applicable [IRC 2903.9.3]

An access panel must be installed where required for valves, shut offs, or other plumbing components to allow maintenance and inspection.

Common Reasons for Failure:

• No access panel provided where needed, such as for water shut-off valves or clean-outs.
• Inaccessible or poorly located access panels.
• Panels that are too small or difficult to open.

4. Septic/Sewer Complete &; Operable [IRC 3001]

The septic or sewer system must be fully installed and operational, with no blockages or incomplete connections.

Common Reasons for Failure:

• Incomplete septic or sewer connections.
• Clogged or improperly sloped sewer lines leading to poor drainage.
• Inspection of the septic tank or drain field not completed.
• Missing required inspections or certifications.

5. Water Heater Location [IRC 2005.2]

The water heater must be installed in an approved location that meets safety and access requirements.

Common Reasons for Failure:

• Installation in an unapproved location (e.g., in a bedroom or bathroom closet without proper ventilation).
• Insufficient clearance around the water heater.
• Inadequate ventilation or air supply for the heater.

6. Water Heater Shut-off Valve [IRC 2903.9.2]

A shut-off valve must be installed on the cold water supply line to the water heater for safety and maintenance purposes.

Common Reasons for Failure:

• Missing or inaccessible shut-off valve.
• Shut-off valve installed in the wrong location (e.g., on the hot water side).
• Valve does not meet code standards (wrong type or material).

7. Water Heater Protection from Physical Damage [IRC 1307.3.1]

The water heater must be protected from potential physical damage, such as from nearby vehicles or other hazards in garages or utility rooms.

Common Reasons for Failure:

• Water heater not properly shielded or protected from vehicle impact in a garage (e.g., missing bollards or barriers).
• Installed in a high-traffic area with no physical protection.
• Improper installation height or exposure to damage-prone conditions.

8. Water Heater Safety Pan &; Relief Valve Waste [IRC 2801.6, IRC 2804]

A safety pan and proper discharge pipe must be installed to prevent water damage in case of leaks or over-pressure from the water heater.

Common Reasons for Failure:

• Missing or improperly installed safety pan beneath the water heater.
• Incorrect or absent relief valve discharge pipe.
• Discharge pipe not terminating in an approved location (e.g., not directed outside or to an appropriate drain).
• Inadequate or missing slope on discharge pipe for drainage.

Failing to meet any of these requirements can lead to a failed final plumbing inspection, often requiring corrections and re-inspection before approval.