Common Plumbing Defects Found During Home Inspections

As a home inspector with over 20 years of experience in Pittsburgh, I've seen my fair share of plumbing issues. Understanding these common defects can help you make informed decisions when buying a home or maintaining your current property.

1. Leaking Fixtures and Connections

One of the most frequent issues I encounter is leaking at various connection points. This includes:

• Under-sink connections: Often caused by loose fittings or worn-out washers
• Toilet base leaks: Usually indicating a failed wax ring seal
• Faucet drips: Commonly due to worn cartridges or valve seats

While these may seem minor, even small leaks can lead to significant water damage, mold growth, and increased utility bills over time.

2. Improper Drain Slope

Proper drainage is crucial for any plumbing system. I frequently find:

• Negative slope causing standing water in pipes
• Insufficient slope leading to slow drainage
• Sagging pipes due to improper support

These issues can result in frequent clogs, sewage backups, and eventually pipe failure.

3. Water Heater Problems

Water heaters are often neglected until they fail. Common issues include:

• Missing or improperly installed TPR valves: A serious safety hazard
• Corrosion and rust: Indicating the unit is nearing end of life
• Improper venting: Can lead to carbon monoxide dangers
• Lack of expansion tanks: Required in many jurisdictions for closed systems

4. Outdated or Hazardous Piping Materials

In older Pittsburgh homes, I often encounter:

• Galvanized steel pipes: Prone to corrosion and reduced water flow
• Polybutylene pipes: Known for sudden failure and leaks
• Lead service lines: A serious health hazard requiring immediate attention

5. Cross-Connections and Backflow Issues

These violations can contaminate your drinking water:

• Missing backflow preventers on outdoor faucets
• Improper connections between potable and non-potable water systems
• Submerged inlet conditions in utility sinks

6. Inadequate Water Pressure

Both high and low water pressure can indicate problems:

• High pressure (>80 PSI): Can damage fixtures and cause premature pipe failure
• Low pressure: May indicate corroded pipes, leaks, or municipal supply issues

What This Means for Homebuyers

When these issues are identified during an inspection, don't panic. Many are relatively simple fixes when caught early. However, some, like extensive galvanized pipe replacement or lead service line remediation, can be costly.

Use your inspection report to:

• Negotiate repairs or price adjustments with the seller
• Budget for necessary repairs
• Prioritize safety-related issues
• Plan preventive maintenance

The Importance of Professional Inspection

While some plumbing issues are visible to the untrained eye, many require professional expertise to identify. A thorough home inspection can reveal hidden problems before they become expensive emergencies.

At The Home Pros, we use specialized tools including moisture meters, infrared cameras, and pressure gauges to provide you with a comprehensive assessment of your plumbing system.

Don't let plumbing problems catch you off guard. Schedule your professional home inspection today by calling (412) 403-6057 or booking online.